OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Smartwatches Methodology v2.0
Smartwatches Methodology v2.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontumo Smartwatches Methodology v2.0: technical specifications plus grades from 3,488 independent expert reviews and 5,192 video reviews, with 0% commercial bias.
Explore Smartwatches Methodology v2.0

Tozo S1 Review | 126 Data compared

Avg. price:~£20Screen size:1.54 inchBattery life:15 daysDisplay type:AMOLED

Tozo S1 Review: Compare 126 technical specifications and expert reviews to see how this product ranks in the Smartwatches category and whether it is worth buying.

5.7

Overall score

Score
5.7/ 10
✕
What it is
An overall evaluation of the smartwatch's quality, based on technical analyses and user reviews.
When it matters
When you need a quick reference to identify the best smartwatches on the market.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 84% of models
Score components

70%

5.2

Technical score

30%

?

Review score

Review score 30% · 7.0 · no independent reviews yet
Until reviews appear, its review part counts as 7/10. Every model in this category gets the same split: reviews 30%, technical score 70%.
â–¼Worse than 84% of smartwatches
5.2

Technical score

Technical score
5.2/ 10
✕
What it is
An assessment of the smartwatchx27s technical performance, covering seven key areas: health, fitness, display & design, hardware, battery, smart features and connectivity.
When it matters
When you want to compare smartwatches based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 82% of models
Score components

24%

4.3

Health

21%

4.4

Fitness

16%

8.2

Battery

14%

5.3

Smart features

12%

2.5

Connectivity

9%

6.5

Display & Design

4%

6.5

Hardware

â–¼Worse than 82% of smartwatches
?

Review score

Review score
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves.
Weighting: Big test sites count more, short reviews half as much as full tests. A video review counts half.
Share: Reviews are 30% of the overall score for every model in this category; each of the 5 needed reviews that is missing counts as 7/10.
Score distribution
â–¼
<55-66-77-88-99-10
Grades by review (0)
We have not found an independent test of this model yet, so its review part counts as 7/10.
Shop star ratings are not part of this score.
No expert tests yet
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Best rankings

Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of smartwatch Tozo S1

Technical score
Technical score
5.2/ 10
✕
What it is
An assessment of the smartwatchx27s technical performance, covering seven key areas: health, fitness, display & design, hardware, battery, smart features and connectivity.
When it matters
When you want to compare smartwatches based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 82% of models
Score components:

24%

4.3

Health

21%

4.4

Fitness

16%

8.2

Battery

14%

5.3

Smart features

12%

2.5

Connectivity

9%

6.5

Display & Design

4%

6.5

Hardware

5.2
Review score
Review score
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves.
Weighting: Big test sites count more, short reviews half as much as full tests. A video review counts half.
Share: Reviews are 30% of the overall score for every model in this category; each of the 5 needed reviews that is missing counts as 7/10.
Score distribution
â–¼
<55-66-77-88-99-10
Grades by review (0)
We have not found an independent test of this model yet, so its review part counts as 7/10.
Shop star ratings are not part of this score.
?
Value for money
Value for money
7.0/ 10
✕
What it is
An indicator that combines the smartwatch's overall rating with its cost.
When it matters
When you are looking for a smartwatch with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 82% of models
Score components:

60%

5.7

Overall score

40%

10

Price

7.0
Brand name
Tozo
Heart rate monitor
yes
Heart rate monitor
yes
â–² Better than 11% of models
This smartwatch includes a heart rate monitor. 10.5% of smartwatches include a heart rate monitor.
Blood oxygen monitoring
no
Blood oxygen monitoring
no
â–¼ Worse than 67% of models
This smartwatch does not support blood oxygen monitoring. 66.8% of smartwatches support blood oxygen monitoring.
ECG
no
ECG
no
â–¼ Worse than 17% of models
This smartwatch does not support ECG. 16.6% of smartwatches support ECG.
Irregular heart rate warnings
no
Irregular heart rate warnings
no
â–¼ Worse than 48% of models
This smartwatch does not support irregular heart rate warnings. 48.2% of smartwatches support irregular heart rate warnings.
Show more
Accelerometer
yes
Accelerometer
yes
â–² Better than 1% of models
This smartwatch includes an accelerometer. 0.6% of smartwatches include an accelerometer.
Barometer
no
Barometer
no
â–¼ Worse than 50% of models
This smartwatch does not include a barometer. 49.6% of smartwatches include a barometer.
Gyroscope
no
Gyroscope
no
â–¼ Worse than 70% of models
This smartwatch does not include a gyroscope. 70% of smartwatches include a gyroscope.
Cadence sensor
no
Cadence sensor
no
â–¼ Worse than 31% of models
This smartwatch does not include a cadence sensor. 31.2% of smartwatches include a cadence sensor.
Distance tracking
no
Distance tracking
no
â–¼ Worse than 96% of models
This smartwatch does not support distance tracking. 96% of smartwatches support distance tracking.
Show more
Battery life
15 days
Battery life
15 days
â–² Better than 86% of models
Market range: <1 days – >16 days
This smartwatch offers a battery life of 15 days which is longer than that of 86.3% of smartwatches and equal to that of 3.2% of smartwatches.
Up to 15 days of regular use and up to 90 days in standby.
Battery life in training mode
50 h
Battery life in training mode
50 h
★ Better than 92% of models
Market range: <5.5 h – >48 h
This smartwatch lasts 50 h in training mode which is longer than 92.3% of smartwatches and equal to that of 1.7% of smartwatches.
Battery life with GPS on
N/A
Battery power
300 mAh
Battery power
300 mAh
â–¼ Worse than 49% of models
Market range: <195 mAh – >475 mAh
This smartwatch has a battery capacity of 300 mAh which is larger than the batteries in 44.5% of smartwatches and equal to those in 6.7% of smartwatches.
Charge time
?
Show more
Operating system
Wear OS
Operating system
Wear OS
â–² Better than 79% of models
This smartwatch runs Wear OS which is more advanced than the operating system in 79% of smartwatches and the same as that in 16.6% of smartwatches.
Software update frequency
occasional
Software update frequency
occasional
â–² Better than 58% of models
This smartwatch has occasional software update support which is more active than that of 57.6% of smartwatches and equal to that of 36.2% of smartwatches.
Updates are typically released about every 3 months.
Third-party app support
no
Third-party app support
no
â–¼ Worse than 48% of models
This smartwatch does not support third-party apps. 47.7% of smartwatches support third-party apps.
Notifications
yes
Notifications
yes
Category Benchmark
This smartwatch supports notifications. 0.3% of smartwatches support notifications.
Voice assistant support
yes
Voice assistant support
yes
â–² Better than 32% of models
This smartwatch supports voice assistants. 32.4% of smartwatches support voice assistants.
Show more
Cellular module
no
Cellular module
no
â–¼ Worse than 18% of models
This smartwatch does not include a cellular module. 18% of smartwatches include a cellular module.
SIM cards
0
GPS
no
GPS
no
â–¼ Worse than 56% of models
This smartwatch does not support GPS. 56.2% of smartwatches support GPS.
Galileo support
no
Galileo support
no
â–¼ Worse than 39% of models
This smartwatch does not support Galileo navigation. 38.5% of smartwatches support Galileo navigation.
Compass
no
Compass
no
â–¼ Worse than 53% of models
This smartwatch does not include a compass. 52.7% of smartwatches include a compass.
Show more
Screen size
1.54 inch
Screen size
1.54 inch
â–² Better than 71% of models
Market range: <1.2 inch – >1.82 inch
This smartwatch has a screen size of 1.54 inch which is larger than the screens of 70.5% of smartwatches and equal to those of 0.7% of smartwatches.
Display type
AMOLED
Display type
AMOLED
â–² Better than 50% of models
This smartwatch uses a AMOLED display type which is more advanced than that of 49.9% of smartwatches and the same as that of 50.1% of smartwatches.
Resolution
240x 240
Resolution
240x 240
â–¼ Worse than 74% of models
This smartwatch has a display resolution of 240x240 which is lower than that of 73.9% of smartwatches and equal to that of 15.2% of smartwatches.
Pixel density
220 ppi
Pixel density
220 ppi
â–¼ Worse than 85% of models
Market range: <207 ppi – >461 ppi
This smartwatch has a pixel density of 220 ppi which is lower than that of 84.9% of smartwatches and equal to that of 0.7% of smartwatches.
Display brightness
?
Show more
CPU speed
?
Processor model
?
RAM
?
Internal storage
0 GB
Internal storage
0 GB
â–¼ Worse than 74% of models
Market range: <0 GB – >32 GB
This smartwatch uses 0 GB for internal storage which is smaller than that of 73.6% of smartwatches and equal to that of 26.4% of smartwatches.
No local user storage for apps/media
External memory slot
no
External memory slot
no
Category Benchmark
This smartwatch does not include an external memory slot. 0.3% of smartwatches include an external memory slot.
Show more

Tozo S1 vs the average smartwatch

246810TotalHealthFitnessBatteryConnectivityDisplay & DesignSmart featuresHardware
  • 8 days day/s longer battery life
    Battery life
    15 days
    â–² Better than 86% of models
    Market range: <1 days – >16 days
    This smartwatch offers 15 days of battery life, while the average smartwatch offers 7 days.
    Up to 15 days of regular use and up to 90 days in standby.
    15 days vs 7 days
  • More advanced operating system
    Operating system
    Wear OS
    â–² Better than 79% of models
    This smartwatch runs a more advanced operating system than the average smartwatch (Wear OS vs Proprietary OS).
    Wear OS vs Proprietary OS
  • 30.75 h longer training battery life
    Battery life in training mode
    50 h
    ★ Better than 92% of models
    Market range: <5.5 h – >48 h
    This smartwatch lasts longer in training mode than the average smartwatch (50 h vs 19.25 h). The average smartwatch lasts 19.25 h.
    50 h vs 19.25 h
  • VO2 max measurement
    VO2 max measurement
    yes
    â–² Better than 52% of models
    This smartwatch measures VO2 max, the average smartwatch does not. 47.6% of smartwatches measure VO2 max.
  • More frequent updates
    Software update frequency
    occasional
    â–² Better than 58% of models
    This smartwatch receives occasional software updates, while the average smartwatch receives ended updates.
    Updates are typically released about every 3 months.
    occasional vs ended
  • 4.9 mm thinner watch body
    Thickness
    6.70 mm
    ★ Better than 98% of models
    Market range: <9.8 mm – >14.1 mm
    This smartwatch is thinner than the average smartwatch (6.7 mm vs 11.6 mm). The average smartwatch thickness is 11.6 mm.
    6.70 mm vs 11.6 mm
  • Water intake tracking
    Water intake tracking
    yes
    â–² Better than 56% of models
    This smartwatch tracks water intake, the average smartwatch does not. 44% of smartwatches track water intake.
  • 6.5x cheaper
    Tozo S1 is cheaper than the average smartwatch (£20 vs £130).
    £20 vs £130
  • 6.5x cheaper
    Tozo S1 is cheaper than the average smartwatch (£20 vs £130).
    £20 vs £130
  • VO2 max measurement
    VO2 max measurement
    yes
    â–² Better than 52% of models
    This smartwatch measures VO2 max, the average smartwatch does not. 47.6% of smartwatches measure VO2 max.
  • Water intake tracking
    Water intake tracking
    yes
    â–² Better than 56% of models
    This smartwatch tracks water intake, the average smartwatch does not. 44% of smartwatches track water intake.
  • 8 days day/s longer battery life
    Battery life
    15 days
    â–² Better than 86% of models
    Market range: <1 days – >16 days
    This smartwatch offers 15 days of battery life, while the average smartwatch offers 7 days.
    Up to 15 days of regular use and up to 90 days in standby.
    15 days vs 7 days
  • 30.75 h longer training battery life
    Battery life in training mode
    50 h
    ★ Better than 92% of models
    Market range: <5.5 h – >48 h
    This smartwatch lasts longer in training mode than the average smartwatch (50 h vs 19.25 h). The average smartwatch lasts 19.25 h.
    50 h vs 19.25 h
  • 4.9 mm thinner watch body
    Thickness
    6.70 mm
    ★ Better than 98% of models
    Market range: <9.8 mm – >14.1 mm
    This smartwatch is thinner than the average smartwatch (6.7 mm vs 11.6 mm). The average smartwatch thickness is 11.6 mm.
    6.70 mm vs 11.6 mm
  • 0.14 inch larger screen size
    Screen size
    1.54 inch
    â–² Better than 71% of models
    Market range: <1.2 inch – >1.82 inch
    This smartwatch has a larger screen size than the average smartwatch (1.5 inch vs 1.4 inch). The average smartwatch screen is 1.40 inch.
    1.54 inch vs 1.40 inch
  • 32.8 mm narrower watch width
    Width
    9.2 mm
    ★ Better than 98% of models
    Market range: <34.6 mm – >46.8 mm
    This smartwatch is narrower than the average smartwatch (9.2 mm vs 42 mm). The average smartwatch width is 42.0 mm.
    9.2 mm vs 42.0 mm
  • 35.7 mm shorter watch height
    Height
    9.3 mm
    ★ Better than 99% of models
    Market range: <39.5 mm – >51 mm
    This smartwatch is shorter than the average smartwatch (9.3 mm vs 45 mm). The average smartwatch height is 45 mm.
    9.3 mm vs 45 mm
  • More advanced operating system
    Operating system
    Wear OS
    â–² Better than 79% of models
    This smartwatch runs a more advanced operating system than the average smartwatch (Wear OS vs Proprietary OS).
    Wear OS vs Proprietary OS
  • More frequent updates
    Software update frequency
    occasional
    â–² Better than 58% of models
    This smartwatch receives occasional software updates, while the average smartwatch receives ended updates.
    Updates are typically released about every 3 months.
    occasional vs ended
  • No blood oxygen monitoring
    Blood oxygen monitoring
    no
    â–¼ Worse than 67% of models
    This smartwatch does not support blood oxygen monitoring, the average smartwatch does. 66.7% of smartwatches support blood oxygen monitoring.
  • No GPS support
    Route support
    no
    â–¼ Worse than 50% of models
    This smartwatch does not support GPS, the average smartwatch does. 56.1% of smartwatches support GPS.
  • No multi-sport mode
    Multi-sport mode
    no
    â–¼ Worse than 69% of models
    This smartwatch does not include a multi-sport mode, the average smartwatch does. 68.4% of smartwatches include a multi-sport mode.
  • No elevation tracking
    Elevation tracking
    no
    â–¼ Worse than 64% of models
    This smartwatch does not support elevation tracking, the average smartwatch does. 64.3% of smartwatches support elevation tracking.
  • No pace tracking
    Pace tracking
    no
    â–¼ Worse than 79% of models
    This smartwatch does not support pace tracking, the average smartwatch does. 78.6% of smartwatches support pace tracking.
  • 48.5 m lower water resistance depth
    Waterproof depth rating
    1.5 m
    â–¼ Worse than 66% of models
    Market range: <1 m – >50 m
    This smartwatch has a shallower waterproof rating than the average smartwatch (1.5 m vs 50 m). The average smartwatch reaches 50 m.
    1.5 m vs 50 m
  • No route tracking
    Route support
    no
    â–¼ Worse than 50% of models
    This smartwatch does not support route tracking, the average smartwatch does. 74.6% of smartwatches support route tracking.
  • No coaching features
    Coaching
    no
    â–¼ Worse than 55% of models
    This smartwatch does not support coaching, the average smartwatch does. 54.6% of smartwatches support coaching.
  • 7.3% worse value for money
    Tozo S1 has a lower value-for-money score than the average smartwatch (7 vs 7.5).
    7 vs 7.52
  • No blood oxygen monitoring
    Blood oxygen monitoring
    no
    â–¼ Worse than 67% of models
    This smartwatch does not support blood oxygen monitoring, the average smartwatch does. 66.7% of smartwatches support blood oxygen monitoring.
  • No cycle tracking
    Menstrual cycle tracking
    no
    â–¼ Worse than 64% of models
    This smartwatch does not support menstrual cycle tracking, the average smartwatch does. 64.3% of smartwatches support menstrual cycle tracking.
  • No smart scale support
    Smart scale compatibility
    no
    â–¼ Worse than 54% of models
    This smartwatch does not support smart scale compatibility, the average smartwatch does. 53.7% of smartwatches support smart scale compatibility.
  • No multi-sport mode
    Multi-sport mode
    no
    â–¼ Worse than 69% of models
    This smartwatch does not include a multi-sport mode, the average smartwatch does. 68.4% of smartwatches include a multi-sport mode.
  • No elevation tracking
    Elevation tracking
    no
    â–¼ Worse than 64% of models
    This smartwatch does not support elevation tracking, the average smartwatch does. 64.3% of smartwatches support elevation tracking.
  • No pace tracking
    Pace tracking
    no
    â–¼ Worse than 79% of models
    This smartwatch does not support pace tracking, the average smartwatch does. 78.6% of smartwatches support pace tracking.
  • No route tracking
    Route support
    no
    â–¼ Worse than 50% of models
    This smartwatch does not support route tracking, the average smartwatch does. 74.6% of smartwatches support route tracking.
  • No coaching features
    Coaching
    no
    â–¼ Worse than 55% of models
    This smartwatch does not support coaching, the average smartwatch does. 54.6% of smartwatches support coaching.
  • No auto-pause
    Auto pause
    no
    â–¼ Worse than 59% of models
    This smartwatch does not support auto pause, the average smartwatch does. 59.3% of smartwatches support auto pause.
  • No gyroscope
    Gyroscope
    no
    â–¼ Worse than 70% of models
    This smartwatch does not include a gyroscope, the average smartwatch does. 69.9% of smartwatches include a gyroscope.
  • No distance tracking
    Distance tracking
    no
    â–¼ Worse than 96% of models
    This smartwatch does not support distance tracking, the average smartwatch does. 95.9% of smartwatches support distance tracking.
  • 76 fewer exercise profiles
    Multi-sport mode
    4
    â–¼ Worse than 69% of models
    This smartwatch supports fewer exercise modes than the average smartwatch (4 vs 80). The average smartwatch supports 80 exercise modes.
    Reported as at least 4 exercise modes.
    4 vs 80
  • No voice feedback
    Voice feedback
    no
    â–¼ Worse than 62% of models
    This smartwatch does not support voice feedback, the average smartwatch does. 61.9% of smartwatches support voice feedback.
  • No GPS support
    Route support
    no
    â–¼ Worse than 50% of models
    This smartwatch does not support GPS, the average smartwatch does. 56.1% of smartwatches support GPS.
  • No compass
    Compass
    no
    â–¼ Worse than 53% of models
    This smartwatch does not include a compass, the average smartwatch does. 52.6% of smartwatches include a compass.
  • 48.5 m lower water resistance depth
    Waterproof depth rating
    1.5 m
    â–¼ Worse than 66% of models
    Market range: <1 m – >50 m
    This smartwatch has a shallower waterproof rating than the average smartwatch (1.5 m vs 50 m). The average smartwatch reaches 50 m.
    1.5 m vs 50 m
  • Lower IP rating
    IP rating
    IPX8
    â–¼ Worse than 93% of models
    This smartwatch has a lower IP rating than the average smartwatch (IPX8 vs IP68).
    Also reported with 50M water-resistance rating.
    IPX8 vs IP68
  • 95 g heavier weight
    Weight
    140.0 g
    â–¼ Worse than 99% of models
    Market range: <29 g – >80 g
    This smartwatch is heavier than the average smartwatch (140 g vs 45 g). The average smartwatch weighs 45.0 g.
    140.0 g vs 45.0 g
  • 106 ppi lower pixel density
    Pixel density
    220 ppi
    â–¼ Worse than 85% of models
    Market range: <207 ppi – >461 ppi
    This smartwatch has a lower pixel density than the average smartwatch (220 ppi vs 326 ppi). The average smartwatch display reaches 326 ppi.
    220 ppi vs 326 ppi
  • Lower resolution
    Display type
    240 x 240
    â–² Better than 50% of models
    This smartwatch has a display resolution of 240x240, while the average smartwatch reaches 352x430.
    240x240 vs 352x430
  • Less practical form
    Form
    rectangular
    â–¼ Worse than 72% of models
    This smartwatch uses a rectangular form, while the average smartwatch uses round.
    rectangular vs round
  • No music playback
    Music playback
    no
    â–¼ Worse than 54% of models
    This smartwatch does not support music playback, the average smartwatch does. 54.2% of smartwatches support music playback.
  • No voice command support
    Voice commands
    no
    â–¼ Worse than 67% of models
    This smartwatch does not support voice commands, the average smartwatch does. 67% of smartwatches support voice commands.
  • No passcode
    Passcode
    no
    â–¼ Worse than 68% of models
    This smartwatch does not include passcode protection, the average smartwatch does. 67.8% of smartwatches include passcode protection.
  • No smart alarm
    Smart alarm
    no
    â–¼ Worse than 53% of models
    This smartwatch does not support a smart alarm, the average smartwatch does. 52.7% of smartwatches support smart alarms.
  • 4 GB less storage
    Internal storage
    0 GB
    â–¼ Worse than 74% of models
    Market range: <0 GB – >32 GB
    This smartwatch offers less internal storage than the average smartwatch (0 GB vs 4 GB). The average smartwatch provides 4 GB of storage.
    No local user storage for apps/media
    0 GB vs 4 GB
  • 1 year/s older release date
    Release date
    2020
    â–¼ Worse than 55% of models
    Market range: <2k – >2k
    This smartwatch is an older model than the average smartwatch (2020 vs 2021). The average smartwatch was released in 2021.
    September 2020
    2020 vs 2021

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Not graded yet

Third-party reviews

Read buyer reviews on Amazon →

What we like about Tozo S1

  • Excellent value for money and affordable price point
  • Long battery life, lasting up to 10-15 days on a single charge
  • Accurate real-time heart rate monitoring and sleep tracking
  • Comfortable, lightweight, and sleek design suitable for all-day wear
  • IPX8 waterproof rating, making it suitable for swimming and rain
  • Easy setup and intuitive user interface

What we don't like about Tozo S1

  • Hardware durability issues, specifically strap pins that can easily pull out
  • Limited software customization and basic companion app functionality
  • Inability to change the date format from the American style
  • Intermittent Bluetooth connectivity issues requiring reboots or re-pairing
  • Touchscreen can be overly sensitive or 'touchy' during use
  • Lacks advanced features found in premium models, such as standard/military time switching

Verdict

The TOZO S1 is a budget-friendly activity tracker featuring a 1.54-inch high-resolution color touchscreen (240 x 240 resolution) and Bluetooth 5.0 connectivity for seamless syncing with iOS and Android devices. It provides comprehensive health monitoring, including real-time heart rate tracking, detailed sleep analysis, a pedometer, and a calorie counter. Main pros include its impressive battery life of up to 10–15 days of regular use (90 days standby), an IPX8 waterproof rating suitable for swimming, and a lightweight, comfortable design. However, notable cons reported by users include frequent Bluetooth connectivity drops requiring reboots, a sensitive or 'touchy' touchscreen, and the inability to change the 24-hour military time format.

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