Comparison

KS OS vs RoundLog

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KS OS

This app acts as your personal health steward, integrating health data, movement tracking, and wearable device control. Monitor sleep, record exercise, manage daily reminders, and customize your device's appearance. Share achievements and sync data with Apple Health.

Highlights
  • Health data recording
  • Movement track recording
  • Wearable device control
  • Sleep quality monitoring
  • Exercise and activity tracking
  • Customizable watch faces
  • Achievement sharing
Features
Read full description

KS OS is sports and health App with new features. - It integrates such functions as health data recording, movement track recording and wearable device control, acting as your exclusive health steward. -It records all data from your wearable device, allowing you to focus more on your exercise! After connecting your wearable device to the KS OS App, you have access to: [Manage Health]: Set alarms, call reminders, message notifications, inactivity reminders, drinking reminders, serving as an assistant in your life; Record your sleep data, including sleep duration, deep sleep, light sleep and rapid eye movements (REM), in order to monitor and improve your sleep quality; Record your weight trends and set your weight goal, encouraging you to achieve the daily exercise goal; [Record Exercise& Activities]: Record your exercise data sports (running, biking, swimming, rowing machine, etc.), including your movement track, pace, etc.; Record your daily walking steps, calories, medium and high-intensity exercise and other activity data, and view the complete records on a daily/weekly/monthly basis; [Change Dial]: A rich selection of watch face themes are available in the brand-new cloud dial market, giving your device a new look every day; [Share Achievements]: If you use KS OS App to monitor your excercises continuously, virtual medals will be awarded when you reaches milestones. You can share your weekly exercise information for interaction with your friends. [Data Share]: Connect to synchronize data to Apple Health (HealthKit), to achieve data movement, data and consumed calories sleep simultaneous recording to Apple Health (HealthKit) KS OS App supports multiple languages, and it will support more wearable devices in the future, bringing you more wonderful experiences! You are welcome to send you feedback to: service@kieslect.com

About

RoundLog

Track your boxing, kickboxing, and Muay Thai training sessions with a background timer and detailed logging. Record rounds, combos, and progress with insightful analytics. Offers a free tier with core features and an optional Pro subscription for advanced functionality.

Highlights
  • Background round timer
  • Sparring journal
  • Combo notebook with spaced repetition
  • Progress dashboard
  • Unlimited training logs (Pro)
  • CSV export (Pro)
Features
Read full description

For amateurs who train alone or in shared gyms — Muay Thai, Kickboxing, Boxing — RoundLog logs every round you fight, every combo you drill, every lesson you learn. WHY ROUNDLOG? • Background round timer that won't quit when your phone locks • Sparring journal: round-by-round intensity, techniques, what worked, mistakes • Combo notebook with spaced-repetition reminders so drills stick • Progress dashboard: streak, sessions/week, technique breakdown, PRs • No ads. Ever. Privacy-first behavioral commitments. WHAT'S INCLUDED FREE: • Unlimited training session logs • Full background round timer (round/rest/count + bell + lock-screen) • 5 combo notebook slots • 7-day session history • Basic stats (this week, streak, total) WHAT PRO UNLOCKS: • Unlimited history + unlimited combos with SRS • Sparring tracker with full per-round analytics • Advanced progress charts + technique breakdown • Photo notes per session + CSV export 7-DAY FREE TRIAL on subscription tiers. PRIVACY FIRST: • Anonymous usage stats only — no third-party ad tracking • Subscriptions pay for the app, not your data • Opt out anytime in Settings Privacy Policy: https://roundlog.app/privacy Terms of Use (EULA): https://roundlog.app/terms Support: https://roundlog.app/support

Screenshots

KS OS4 screens
RoundLog4 screens

Verdict

The call

The clearest difference is rating: RoundLog at 5.0 against KS OS's 3.3. RoundLog also leads on update cadence (every 2 weeks vs every 4 weeks). KS OS's advantage is in-app purchases (none vs 3) and ratings volume (51 vs 1). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RoundLog sells 3 in-app purchases, starting at $4.99 per 7 days. KS OS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RoundLog holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: KS OS has 51 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

KS OS ships an update every 4 weeks, RoundLog every 2 weeks. The most recent releases landed on November 12, 2026 and November 10, 2026 respectively.

Scorecard7 real differences · 3 level
KS OS versus RoundLog: the parameters behind the verdict, then further details
ParameterKS OSRoundLog
PriceFreeFree
Rating3.3 (51 ratings)5.0 (1 ratings) — better
Positive reviews17.9% of reviews—
Number of ratings51 — better1
Update frequencyEvery 4 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size198 MB19 MB
Age rating4+4+
Developer上海凯斯领拓技术有限公司Yavuz Aytekin

Customer experience

KS OS

All ratings30 ratings
Positive53.3%
Neutral10.0%
Negative36.7%
Written reviews84 reviews
Positive17.9%
Neutral19.0%
Negative63.1%

RoundLog

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

KS OS

No in-app purchases

3 purchases

RoundLog

Subscriptions3
  • RoundLog Pro (Weekly)3 Days trial$4.997 Days
  • RoundLog Pro3 Days trial$11.991 Month
  • RoundLog Pro (Yearly)3 Days trial$49.991 Year

Questions

Is KS OS free?
KS OS is free to download, with no in-app purchases.
Is RoundLog free?
RoundLog is free to download, with in-app purchases available.
Which has better reviews, KS OS or RoundLog?
RoundLog is rated higher. KS OS averages 3.3 out of 5 from 51 ratings, while RoundLog averages 5.0 from 1 ratings.
Do KS OS or RoundLog have ads?
Neither KS OS nor RoundLog shows ads.
Which is updated more often, KS OS or RoundLog?
KS OS ships an update every 4 weeks, and RoundLog every 2 weeks. Most recently, KS OS was updated on November 12, 2026 and RoundLog on November 10, 2026.

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