Comparison

Caffeine Tracker vs Tummy Bear

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

Head to head
About

Caffeine Tracker

Features
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Know when your caffeine wears off. SipLog tracks every coffee, tea and energy drink and estimates how much caffeine is still in your system right now. See the curve for your day, how far you are into your daily guide, and the time you'll be sleep-ready. LOG IN ONE TAP • Tap a drink to log it, or touch and hold to change the size or time • Undo straight away if you tap the wrong one • Search a library of coffees, teas, sodas and energy drinks, or enter any amount • Save your usual order with its exact caffeine KNOW WHEN YOU'LL SLEEP • A live estimate of caffeine in your system, based on its half-life • Your sleep-ready time, and how each drink would change it before you log it • A cut-off reminder before the last time a coffee will wear off by bedtime • Set your own daily guide, bedtime, half-life and sleep-ready level WIDGETS AND LIVE ACTIVITY • Home Screen and Lock Screen widgets showing caffeine now and when you'll be sleep-ready • Log your usual drinks straight from the widget • A Live Activity counts down to sleep-ready on your Lock Screen and in the Dynamic Island SEE YOUR PATTERNS • Daily, monthly and yearly trends against your guide • Caffeine still active at bedtime and when you usually have your last drink • See how caffeine affects your sleep, using sleep data from Apple Health • Export your history as CSV PRIVATE BY DESIGN • Drinks you log are saved to Apple Health if you choose, and sync with iCloud • Sleep data is read only when you turn on the sleep report, and never leaves your iPhone SIPLOG PRO Pro unlocks your sleep-ready time and what-if preview, the sleep report, the Live Activity, month and year trends, and saving your own drinks. Pro is available as a monthly or yearly subscription, with a free trial for new subscribers. Payment is charged to your Apple Account when you confirm the purchase, or at the end of the free trial. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple Account settings. SipLog gives estimates for awareness. It isn't medical advice. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://siplog-website.vercel.app/posts/privacy/

About

Tummy Bear

This app offers a straightforward way to monitor your baby's tummy time sessions. Set daily goals, start a timer with a single tap, and view progress through Live Activities and Dynamic Island. It provides a distraction-free tracking experience.

Highlights
  • Tummy time tracking
  • Daily goal setting
  • One-tap timer start
  • Live Activities integration
  • Dynamic Island support
  • Distraction-free interface
Features
Read full description

Tummy Bear is a calm and simple tummy-time tracker that helps you keep track of every little milestone. Set a daily goal, start the timer with one tap, and follow your progress with Live Activities and Dynamic Island. No ads. No account. No subscription. Just a simple, distraction-free way to track tummy time. Created with love by a developer and new mom

Screenshots

Caffeine Tracker4 screens
Tummy Bear4 screens

Verdict

The call

The clearest difference is in-app purchases: Tummy Bear at none against Caffeine Tracker's 2. Tummy Bear also leads on update cadence (every 2 weeks vs monthly) and device support (3 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. Caffeine Tracker sells 2 in-app purchases, starting at $2.99 per month. Tummy Bear asks for nothing beyond the download.

UpkeepUpdate frequency

Caffeine Tracker ships an update monthly, Tummy Bear every 2 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 5 level
Caffeine Tracker versus Tummy Bear: the parameters behind the verdict, then further details
ParameterCaffeine TrackerTummy Bear
PriceFreeFree
Rating—1.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS26.016.4 — better
Further details — not scored
Size15 MB47 MB
Age rating4+4+
DeveloperGruffydd JohnstonHeeyeon Lee

In-app purchases

2 purchases

Caffeine Tracker

Subscriptions2
  • Monthly7 Days trial$2.991 Month
  • Annual7 Days trial$9.991 Year
None

Tummy Bear

No in-app purchases

Questions

Is Caffeine Tracker free?
Caffeine Tracker is free to download, with in-app purchases available.
Is Tummy Bear free?
Tummy Bear is free to download, with no in-app purchases.
Do Caffeine Tracker or Tummy Bear have ads?
Neither Caffeine Tracker nor Tummy Bear shows ads.
Which is updated more often, Caffeine Tracker or Tummy Bear?
Caffeine Tracker ships an update monthly, and Tummy Bear every 2 weeks. Most recently, Caffeine Tracker was updated on October 30, 2026 and Tummy Bear on October 31, 2026.

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