Comparison

Ksteps vs Caffeine mg

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

Head to head
About

Ksteps

Features
Read full description

Ksteps is an app that helps you quickly check your step count directly from your Apple Watch face. With complications, you can instantly view today’s steps on your watch face, and the app supports a variety of complication styles. Add it easily without complicated setup and keep track of your daily activity at a glance. Key Features β€’ Apple Watch complication support β€’ Quickly check your step count from the watch face β€’ Various complication styles available β€’ Simple setup and intuitive usage How to Use Install Ksteps on your Apple Watch. Press and hold the watch face to open the edit screen. Select Ksteps when adding a complication.

About

Caffeine mg

Features
Read full description

Caffeine mg is a one-tap caffeine tracker that visualises remaining body caffeine and the time it drops below a sleep-friendly threshold using a half-life decay model. "Can I have one more coffee this afternoon and still sleep tonight?" β€” that's the question this app answers. β–  Who it's for - Daily coffee or energy drink consumers - People whose afternoon caffeine affects sleep - Users who prefer no ads and one-time purchases - Login-free tracking with caffeine records stored on device β–  Main features - 50+ preset drinks (coffee, energy drinks, tea, etc.) - Custom drinks with caffeine content and serving size - Tap to log "now", long press to set the time - Today's total intake and remaining allowance (400mg default) - Half-life decay simulation - Home screen widget for one-tap logging - Siri / Shortcuts support - Last 7 days of history β–  iOS 18 features (Pro) - Live Activity + Dynamic Island for body caffeine + sleep-friendly time - Lock Screen Control + Control Center for one-tap logging - Action Button on iPhone 15 Pro and later - Half-life simulation chart β–  Pro (one-time, JPY 370) - Unlimited custom drinks - Live Activity / Dynamic Island - Lock Screen Control - Action Button integration - Full history + CSV export - Medium / Large widgets β–  Why we made it - Free to start (50+ presets + 3 custom drinks) - No login, no account - Caffeine records stay on device; anonymous usage events are optional - No subscription. Pro is one-time only. - Zero ads. β–  Science - Daily upper limit 400 mg (WHO / FDA / EFSA / Health Canada / Japan MHLW Sleep Guidelines 2023 consensus) - 50 mg "sleep-friendly residual" threshold per Japan MHLW Sleep Guidelines 2023 - Default half-life is 5 hours (individual range 3-7 hours) - All thresholds adjustable in Settings β–  Requirements - iOS 18.0 or later (for Live Activity / Lock Screen Control / Action Button) This app is intended as a caffeine intake tracker. It does not provide medical advice, diagnosis, drug-interaction checks, or individualised guidance for pregnant users, users with cardiac conditions, etc. Please consult a doctor or pharmacist for health decisions.

Screenshots

Ksteps4 screens
Caffeine mg4 screens

Verdict

The call

The clearest difference is in-app purchases: Ksteps at none against Caffeine mg's 1. Caffeine mg's advantage is iOS requirement (18.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Caffeine mg sells 1 one-off in-app purchase. Ksteps asks for nothing beyond the download.

UpkeepUpdate frequency

Ksteps ships an update every 5 days, Caffeine mg weekly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

Scorecard2 real differences Β· 4 level
Ksteps versus Caffeine mg: the parameters behind the verdict, then further details
ParameterKstepsCaffeine mg
PriceFreeFree
Update frequencyEvery 5 days β€” betterWeekly
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, Apple Watch β€” betteriPhone
Requires iOS26.018.0 β€” better
Further details β€” not scored
Size10 MB5 MB
Age rating4+4+
DeveloperKiyeong Jeongkensuke ueda

In-app purchases

None

Ksteps

No in-app purchases

1 purchases

Caffeine mg

One-time1
  • カフェむンmg Pro$1.99

Questions

Is Ksteps free?
Ksteps is free to download, with no in-app purchases.
Is Caffeine mg free?
Caffeine mg is free to download, with in-app purchases available.
Do Ksteps or Caffeine mg have ads?
Neither Ksteps nor Caffeine mg shows ads.
Which is updated more often, Ksteps or Caffeine mg?
Ksteps ships an update every 5 days, and Caffeine mg weekly. Most recently, Ksteps was updated on October 9, 2026 and Caffeine mg on October 7, 2026.

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