Comparison

Expain vs Waterly Water Tracker

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

Head to head
About

Expain

Features
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Tracking your pain is the first step to gain control over your pain. The Expain app lets you track and view your pain in an intuitive and simple way. To get started, select a body segment and enter how much it hurts. If you have pain in more than one segment, simply add more pain logs. If tracking your pain is not enough, use the Expain app to connect to the Expain Bluetooth Smart connected products. The app connects to Expain Change Neck & Shoulders, Expain Change Arm, Expain Activate Knee and Expain Relax Legs. The Expain Change products is biosensors that alert you with a gentle vibration when it detects a potential harmful muscle activity pattern.

About

Waterly Water Tracker

Features
Read full description

Waterly helps you build a steady hydration routine without adding friction to your day. Set your daily goal, choose reminder intervals or fixed times, log drinks in one tap, and see your progress instantly. Whether you want a simple water reminder or a more flexible drink tracker, Waterly keeps everything clear and fast. Features: - Smart local reminders based on intervals or fixed times - Sleep-friendly do not disturb hours - Daily dashboard with progress, remaining amount, and next reminder - Quick add presets plus custom drink amounts - Water and beverage tracking with hydration factors - History with weekly and monthly charts - Streaks and badges to support consistency - Edit or delete past entries anytime - No account required - Data stored locally on your device Built for everyday habit tracking: - Flexible setup during onboarding - Optional automatic daily target - Support for ml and oz units - JSON export for your data - App language settings and notification controls Waterly is not a medical device and does not provide medical advice, diagnosis, or treatment.

Screenshots

Expain4 screens
Waterly Water Tracker4 screens

Verdict

The call

The clearest difference is ads: Expain at none against Waterly Water Tracker's shown. Expain also leads on iOS requirement (8.1 vs 16.4). Waterly Water Tracker's advantage is update cadence (every 2 months vs every 5 months). On price, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Expain ships an update every 5 months, Waterly Water Tracker every 2 months. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

Scorecard3 real differences ยท 3 level
Expain versus Waterly Water Tracker: the parameters behind the verdict, then further details
ParameterExpainWaterly Water Tracker
PriceFreeFree
Update frequencyEvery 5 monthsEvery 2 months โ€” better
AdsNo โ€” betterYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS8.1 โ€” better16.4
Further details โ€” not scored
Size64 MB40 MB
Age rating17+4+
DeveloperExpain ASClaudio Fusillo

In-app purchases

None

Expain

No in-app purchases

None

Waterly Water Tracker

No in-app purchases

Questions

Is Expain free?
Expain is free to download, with no in-app purchases.
Is Waterly Water Tracker free?
Waterly Water Tracker is free to download, with no in-app purchases.
Do Expain or Waterly Water Tracker have ads?
Waterly Water Tracker shows ads; Expain does not.
Which is updated more often, Expain or Waterly Water Tracker?
Expain ships an update every 5 months, and Waterly Water Tracker every 2 months. Most recently, Expain was updated on November 11, 2026 and Waterly Water Tracker on October 31, 2026.

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