OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Smartwatches Methodology v3.0
Smartwatches Methodology v3.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Smartwatches Methodology v3.0: the technical score from the specifications is the base, and independent expert and video reviews (up to ±0.5 points), owner opinions (up to ±0.3) and best-of lists (up to +0.3) move it up or down.
Explore Smartwatches Methodology v3.0

Kospet Tank M4 review: 127 specs compared

Avg. price:~£?Screen size:1.96 inchBattery life:15 daysDisplay type:AMOLED

Kospet Tank M4 Review: Compare 127 technical specifications and 29 expert and video reviews to see how this product ranks in the Smartwatches category and whether it is worth buying.

Kospet Tank M4
7.9/10

Overall score

Score
7.9/ 10
✕
What it is
Our main score for this model, 1–10. It combines specs, best-of lists, expert reviews and owners.
How we count it
Parts: Technical score 35%, List score 30%, Reviews score 25%, Sentiment score 10%
Marks: Each part gets a mark out of 10. For reviews, lists and owners, a typical model in this category gets about 8 and the best one gets 10.
No data yet: A part with no data shows "?". It counts as the mark of a weaker model in this category (4 in 5 models with data score higher). This way, models with reviews, lists and owners usually come out ahead.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 79% of models
Score components

35%

7.9

Technical score

30%

?

List scoreNot enough data yet, so we use 7.5, the mark of a weaker model in this category

25%

8.7

Reviews score

10%

6.9

Sentiment score

▲Better than 79% of smartwatches
?

Value for money

Value for money
✕
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
▼
<55-66-77-88-99-10
Score components

70%

7.9

Overall score

30%

?

Price

Price not known yet
7.9

Technical score

Technical score
7.9/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 82% of models
Score components

24%

7.3

Health

21%

9.6

Fitness

16%

7.3

Battery

14%

7.5

Smart features

12%

7.5

Connectivity

9%

8.1

Display & Design

4%

8.4

Hardware

▲Better than 82%
8.7

Reviews score

Reviews score
8.7/ 10
✕
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. Every review counts the same: written or video, short or full test.
Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.5 for now.
Share: Reviews count 25% of the overall score.
Score distribution
▼
<55-66-77-88-99-10
★ Better than 97% of models

80%

8.7

Average grade

20%

8.7

Popularity

Grades by review (29)
2 reviews + 27 videos, average 8.9/10. Reviews count 25% of the overall score.
User ratings collected online are not part of this score.
★Better than 97%
?

List score

List score
7.5/ 10
✕
What it is
How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
How we count it
Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 30% of the overall score.
Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
Lists with this model (0)
Not in any best-of list yet, so this part counts as 7.5. Models in a list get 8 to 10.
Not in any best-of list yet
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Best prices
*As an Amazon Associate, we earn from qualifying purchases.
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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Smartwatches model ranking

Ranked #150 of 777 models in Smartwatches (Overall score)

Technical Specifications of smartwatch Kospet Tank M4

Technical score
Technical score
7.9/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 82% of models
Score components:

24%

7.3

Health

21%

9.6

Fitness

16%

7.3

Battery

14%

7.5

Smart features

12%

7.5

Connectivity

9%

8.1

Display & Design

4%

8.4

Hardware

7.9
Reviews score
8.7
List score
?
Value for money
Value for money
8.5/ 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
▼
<55-66-77-88-99-10
▲ Better than 84% of models
Score components:

70%

7.9

Overall score

30%

?

Price

8.5
Heart rate monitor
yes
This smartwatch includes a heart rate monitor. 9.5% of smartwatches include a heart rate monitor.
Blood oxygen monitoring
yes
This smartwatch supports blood oxygen monitoring. 30.4% of smartwatches support blood oxygen monitoring.
ECG
no
This smartwatch does not support ECG. 18% of smartwatches support ECG.
Irregular heart rate warnings
?
HRV tracking
?
Show more
What reviewers say
Accelerometer
yes
This smartwatch includes an accelerometer. 0.5% of smartwatches include an accelerometer.
Barometer
yes
This smartwatch includes a barometer. 46.5% of smartwatches include a barometer.
Gyroscope
yes
This smartwatch includes a gyroscope. 28.9% of smartwatches include a gyroscope.
Cadence sensor
?
Distance tracking
yes
This smartwatch supports distance tracking. 3.7% of smartwatches support distance tracking.
Show more
What reviewers say
Battery life
15 days
Market range: <1 days – >16 days
This smartwatch lasts 15 days on a charge, which is longer than 83% of Smartwatches and the same as 3.9% of Smartwatches.
Battery life in training mode
?
Battery life with GPS on
22 h
Market range: <5.75 h – >43 h
This smartwatch lasts 22 h with GPS on, which is longer than 52.5% of Smartwatches and the same as 2.9% of Smartwatches.
Battery power
500 mAh
Market range: <195 mAh – >475 mAh
This smartwatch has a 500 mAh battery, which is larger than 89.8% of Smartwatches and the same as 2.2% of Smartwatches.
Charge time
?
Show more
What reviewers say
Operating system
Proprietary OS
This smartwatch runs Proprietary OS, which is less advanced than the system in 54% of Smartwatches and equal to 42.1% of Smartwatches.
Software update frequency
?
Third-party app support
yes
This smartwatch supports third-party apps. 48.5% of smartwatches support third-party apps.
Notifications
yes
This smartwatch supports notifications. 0.3% of smartwatches support notifications.
Voice assistant support
yes
This smartwatch supports voice assistants. 30.8% of smartwatches support voice assistants.
Show more
What reviewers say
Cellular module
no
This smartwatch does not include a cellular module. 16.6% of smartwatches include a cellular module.
SIM cards
0
GPS
yes
This smartwatch supports GPS. 40.3% of smartwatches support GPS.
Galileo support
yes
This smartwatch supports Galileo navigation. 56.5% of smartwatches support Galileo navigation.
Dual-frequency GPS
yes
Kospet Tank M4 supports dual-frequency GPS. 85% of Smartwatches offer this.
Show more
What reviewers say
Screen size
1.96 inch
Market range: <1.2 inch – >1.82 inch
This smartwatch has a 1.96 inch screen, which is larger than 95.4% of Smartwatches and the same as 1.5% of Smartwatches.
Display type
AMOLED
This smartwatch uses AMOLED, which is more advanced than the screen in 46.9% of Smartwatches and equal to 53.1% of Smartwatches.
Resolution
410x 502
This smartwatch has a display resolution of 410x502 which is higher than that of 68.9% of smartwatches and equal to that of 1.6% of smartwatches.
Pixel density
331 ppi
Market range: <207 ppi – >461 ppi
This smartwatch has a pixel density of 331 ppi, which is higher than 56.3% of Smartwatches and equal to 1.4% of Smartwatches.
Display brightness
1,000 nits
Market range: <450 nits – >2k nits
This smartwatch has a screen brightness of 1,000 nits, which is higher than 53.5% of Smartwatches and equal to 27% of Smartwatches.
Show more
What reviewers say
CPU speed
?
Processor model
?
RAM
0.016 GB
Market range: <0.5 GB – >2 GB
This smartwatch has 0.016 GB of RAM, which is less than 97.7% of Smartwatches and equal to 0.5% of Smartwatches.
Internal storage
32 GB
Market range: <0 GB – >32 GB
This smartwatch has 32 GB of internal storage, which is more than 81.3% of Smartwatches and equal to 15% of Smartwatches.
External memory slot
no
This smartwatch does not include an external memory slot. 0.3% of smartwatches include an external memory slot.
Show more

Kospet Tank M4 vs the average smartwatch

246810TotalHealthFitnessBatteryConnectivityDisplay & DesignSmart featuresHardware
  • 8 days longer battery life
    This smartwatch runs longer per charge than the average smartwatch (15 days vs 7 days). The average smartwatch runs for 7 days on a charge.
    15 days vs 7 days
  • Temperature sensing
    This smartwatch includes a temperature sensor, the average smartwatch does not. 31.9% of smartwatches include a temperature sensor.
  • Maps support
    This smartwatch supports maps, the average smartwatch does not. 34.4% of smartwatches support maps.
  • 0.56 inch larger display
    This smartwatch has a larger screen than the average smartwatch (2 inch vs 1.4 inch). The average smartwatch has a 1.4 inch screen.
    1.96 inch vs 1.4 inch
  • 24.3% higher review score
    Reviews score
    8.7/ 10
    ✕
    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. Every review counts the same: written or video, short or full test.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.5 for now.
    Share: Reviews count 25% of the overall score.
    Score distribution
    ▼
    <55-66-77-88-99-10
    ★ Better than 97% of models

    80%

    8.7

    Average grade

    20%

    8.7

    Popularity

    Grades by review (29)
    2 reviews + 27 videos, average 8.9/10. Reviews count 25% of the overall score.
    User ratings collected online are not part of this score.
    8.7 vs 7.0
  • 8x more internal storage
    This smartwatch has more internal storage than the average smartwatch (32 GB vs 4 GB). The average smartwatch has 4 GB of internal storage.
    32 GB vs 4 GB
  • Supports dual-frequency GPS
    Kospet Tank M4 supports dual-frequency GPS, while the average smartwatch does not. 15.1% of Smartwatches support dual-frequency GPS.
  • Galileo satellite support
    This smartwatch supports Galileo navigation, the average smartwatch does not. 43.6% of smartwatches support Galileo navigation.
  • 24.3% higher review score
    Reviews score
    8.7/ 10
    ✕
    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. Every review counts the same: written or video, short or full test.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.5 for now.
    Share: Reviews count 25% of the overall score.
    Score distribution
    ▼
    <55-66-77-88-99-10
    ★ Better than 97% of models

    80%

    8.7

    Average grade

    20%

    8.7

    Popularity

    Grades by review (29)
    2 reviews + 27 videos, average 8.9/10. Reviews count 25% of the overall score.
    User ratings collected online are not part of this score.
    8.7 vs 7.0
  • 9.9% better value for money
    Kospet Tank M4 has a higher value-for-money score than the average smartwatch (8.53 vs 7.8).
    8.53 vs 7.76
  • Temperature sensing
    This smartwatch includes a temperature sensor, the average smartwatch does not. 31.9% of smartwatches include a temperature sensor.
  • 4 years newer
    This smartwatch was released more recently than the average smartwatch (2025 vs 2021). The average smartwatch was released in 2021.
    2,025 vs 2,021
  • 8 days longer battery life
    This smartwatch runs longer per charge than the average smartwatch (15 days vs 7 days). The average smartwatch runs for 7 days on a charge.
    15 days vs 7 days
  • 195 mAh larger battery capacity
    This smartwatch has a larger battery than the average smartwatch (500 mAh vs 305 mAh). The average smartwatch has a 305 mAh battery.
    500 mAh vs 305 mAh
  • Maps support
    This smartwatch supports maps, the average smartwatch does not. 34.4% of smartwatches support maps.
  • Supports dual-frequency GPS
    Kospet Tank M4 supports dual-frequency GPS, while the average smartwatch does not. 15.1% of Smartwatches support dual-frequency GPS.
  • Galileo satellite support
    This smartwatch supports Galileo navigation, the average smartwatch does not. 43.6% of smartwatches support Galileo navigation.
  • More current Bluetooth version
    This smartwatch uses a more current Bluetooth version than the average smartwatch (5.3 vs 5).
    5.3 vs 5.0
  • 0.56 inch larger display
    This smartwatch has a larger screen than the average smartwatch (2 inch vs 1.4 inch). The average smartwatch has a 1.4 inch screen.
    1.96 inch vs 1.4 inch
  • Stronger ingress protection
    This smartwatch has stronger ingress protection than the average smartwatch (IP69K vs IP68).
    IP69K vs IP68
  • Stronger display glass
    This smartwatch uses Corning Gorilla Glass 3 display glass, while the average smartwatch uses mineral glass.
    Corning Gorilla Glass 3 vs mineral glass
  • Rugged construction
    This smartwatch has a rugged design, the average smartwatch does not. 41.3% of smartwatches have a rugged design.
  • 50 m deeper water rating
    This smartwatch is rated for deeper water than the average smartwatch (100 m vs 50 m). The average smartwatch is rated to 50 m.
    100 m vs 50 m
  • Better case material
    This smartwatch uses stainless steel for the case material, while the average smartwatch uses polycarbonate.
    stainless steel vs polycarbonate
  • 25 °C higher heat tolerance
    This smartwatch tolerates a higher temperature than the average smartwatch (70 °C vs 45 °C). The average smartwatch is rated up to 45.0 °C.
    70 °C vs 45.0 °C
  • 250 nits brighter screen
    This smartwatch has a brighter screen than the average smartwatch (1000 nits vs 750 nits). The average smartwatch peaks at 750 nits.
    1,000 nits vs 750 nits
  • 8x more internal storage
    This smartwatch has more internal storage than the average smartwatch (32 GB vs 4 GB). The average smartwatch has 4 GB of internal storage.
    32 GB vs 4 GB
  • 35 g heavier
    This smartwatch is heavier than the average smartwatch (80 g vs 45 g). The average smartwatch weighs 45.0 g.
    80 g vs 45.0 g
  • Basic battery type
    This smartwatch uses a Li-ion battery, while the average smartwatch uses Li-Po.
    Li-ion vs Li-Po
  • 67 fewer exercise types
    This smartwatch includes fewer exercise types than the average smartwatch (23 vs 90). The average smartwatch includes 90 exercise types.
    23 vs 90
  • 1.3 mm thicker
    This smartwatch is thicker than the average smartwatch (13 mm vs 11.7 mm). The average smartwatch is 11.7 mm thick.
    13 mm vs 11.7 mm
  • 5.5 mm taller case
    This smartwatch has a taller case than the average smartwatch (50.5 mm vs 45 mm). The average smartwatch is 45.0 mm tall.
    50.5 mm vs 45.0 mm
  • 98.4% less RAM
    This smartwatch has less RAM than the average smartwatch (0 GB vs 1 GB). The average smartwatch has 1 GB of RAM.
    0.016 GB vs 1 GB
  • Less practical form
    This smartwatch uses a square form, while the average smartwatch uses round.
    square vs round
  • 8.0% lower sentiment score
    6.9 vs 7.5
  • 8.0% lower sentiment score
    6.9 vs 7.5
  • 67 fewer exercise types
    This smartwatch includes fewer exercise types than the average smartwatch (23 vs 90). The average smartwatch includes 90 exercise types.
    23 vs 90
  • Basic battery type
    This smartwatch uses a Li-ion battery, while the average smartwatch uses Li-Po.
    Li-ion vs Li-Po
  • 35 g heavier
    This smartwatch is heavier than the average smartwatch (80 g vs 45 g). The average smartwatch weighs 45.0 g.
    80 g vs 45.0 g
  • 1.3 mm thicker
    This smartwatch is thicker than the average smartwatch (13 mm vs 11.7 mm). The average smartwatch is 11.7 mm thick.
    13 mm vs 11.7 mm
  • 5.5 mm taller case
    This smartwatch has a taller case than the average smartwatch (50.5 mm vs 45 mm). The average smartwatch is 45.0 mm tall.
    50.5 mm vs 45.0 mm
  • Less practical form
    This smartwatch uses a square form, while the average smartwatch uses round.
    square vs round
  • Basic band material
    This smartwatch uses silicone, rubber for the band material, while the average smartwatch uses silicone.
    silicone, rubber vs silicone
  • 98.4% less RAM
    This smartwatch has less RAM than the average smartwatch (0 GB vs 1 GB). The average smartwatch has 1 GB of RAM.
    0.016 GB vs 1 GB

Video reviews

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

9.0
LuvThemKnives
≈ estimated
28/05/2026
Long-term use · a year of daily wear and pool tests
Verdict
Kospet Tank M4 is a rugged, good-looking watch that does everything and more than most people need.
9.0
Izzy's Salt Life & Outdoor's !
≈ estimated
26/05/2026
Two-week test · salt water, drops and jogging
Verdict
Kospet Tank M4 is a rugged watch worth the price, with plenty of free faces.
8.0
Ryan’s Wrist & EDC
≈ estimated
25/04/2026
Hands-on review · water test, wear and app walkthrough
Verdict
Kospet Tank M4 is a nice, well-designed rugged watch, though it looks large on small wrists.
9.0
Big Stoozer Adventures
≈ estimated
05/12/2025
Hands-on review · mountain biking, navigation and daily features
Verdict
Kospet Tank M4 is a tough, stylish watch that the creator recommends without hesitation for rugged use.
9.0
Survival Russia
≈ estimated
16/11/2025
Hands-on review · workout test, daily use and app
Verdict
Kospet Tank M4 is a good outdoor watch for the price and a real rival to a much pricier Garmin.
9.0
Doodlebud
≈ estimated
14/11/2025
Extended review · daily use, compass and navigation tests
Verdict
Kospet Tank M4 is a clear upgrade over its predecessor and is recommended for both upgraders and first-time buyers.
9.0
PlayTopia
≈ estimated
14/11/2025
Hands-on review · one week of use, plus features and unboxing
Verdict
Kospet Tank M4 is a tough, no-nonsense watch with strong battery life, easily among the best rugged options at its price.
9.0
Tech Round Up
≈ estimated
14/11/2025
Hands-on review · two weeks of wear and GPS run test
Verdict
Kospet Tank M4 offers strong value and good GPS accuracy, and is worth buying despite its bulkier build.
9.0
Ash Does Tech
≈ estimated
27/10/2025
Hands-on review · two weeks of on-and-off use
Verdict
Kospet Tank M4 is a great smartwatch and a strong choice for rugged buyers, with bulk and software as minor drawbacks.
9.0
LL Techview
≈ estimated
19/10/2025
Hands-on review · battery test, features and walkie-talkie
Verdict
Kospet Tank M4 is one of the best rugged watches for the price, though battery life is closer to 15 days than advertised.
7.0
Scuba Diver Magazine
≈ estimated
17/10/2025
Hands-on review · diving modes, fit and usability
Verdict
Kospet Tank M4 is a fair, budget-friendly multisport watch with scuba features, best suited to recreational holiday divers.
9.0
ENDGAME
≈ estimated
17/10/2025
Hands-on review · outdoor walk test and battery life
Verdict
Kospet Tank M4 is a well-built, affordable watch with plenty of features, though not very different from others.
More graded video reviews (4)
creator’s own scoreestimated by us

What reviewers agree on

Based on 2 · 12

Reviewers agree the battery life is outstanding and the build tough, but the watch feels heavy and bulky, and audio disappoints.
Praised
Mixed views
Criticised
Pick a topic to see who said what

Expert reviews

In-depth analysis and verdict from leading tech publications

9.0
sundayindependent.co.za
≈ estimated
03/02/2026
Hands-on test · Rugged iPhone watch
Verdict
The Kospet Tank M4 is a rugged watch that works best with an iPhone, syncing Strava and Apple Health well, but it is heavy and slow to copy music.
9.0
thestar.co.za
≈ estimated
03/02/2026
Hands-on test · Rugged iPhone watch
Verdict
The Kospet Tank M4 is a rugged watch that works best with an iPhone, syncing Strava and Apple Health well, but it is heavy and slow to copy music.

Third-party reviews

What we like about Kospet Tank M4

  • 15 days of battery life covers a long trip without a charger.
  • Dual-frequency GPS stays reliable on every run.
  • A 100 m depth rating suits swimming and water sports.
  • IP69K protection handles hot, high-pressure cleaning.
  • The watch can act as a remote shutter for the iPhone camera.
  • It works from -50 °C to 70 °C, so cold winter runs are no problem.

What we don't like about Kospet Tank M4

  • At 80 g and 13 mm thick, it feels heavy on the wrist.
  • Copying music onto the watch is very slow, and tracks over 100 MB fail.
  • There is no fall detection or crash detection.
  • Notifications often show only the title, not the full message.
  • There is no ECG or blood pressure monitoring.

Verdict

Long days away from a charger suit the Kospet Tank M4, a rugged sports watch for people who train outdoors and would rather not charge it every night. The rated 15 days is realistic in light use, and with GPS on you get about 22 h. Dual-frequency GPS keeps routes accurate, and the workouts sync to Strava and Apple Health without fuss. A 100 m depth rating and IP69K protection mean rain, swims and muddy trails are no trouble. Its 1.96 inch AMOLED screen, rated at 1000 nits, reads well in sunlight. The trade-off is weight: at 80 g and 13 mm thick, the steel body feels heavy and takes time to get used to. It suits a runner or hiker who wants a tough watch that goes a week or more between charges.

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