Comparison

Fasting Well vs WaterLoop

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

Head to head
About

Fasting Well

Track your intermittent fasting journey with science-backed insights. Monitor your progress through different metabolic stages and view your history with a visual heatmap. Offers built-in plans and detailed scientific articles.

Highlights
  • Stage-aware fasting progress visualization
  • Live timer with customizable ring
  • Six built-in fasting plans
  • Journal and weekly progress charts
  • Science-backed articles on fasting
  • Calendar heatmap of activity
  • Privacy-first, on-device data storage
Features
Read full description

Fasting Well is a beautiful, science-grounded intermittent fasting tracker. Designed for the moments your fast actually happens — at home, in transit, before bed — with the kind of polish you'd expect from an app you open every day. EVERY FAST IS A JOURNEY A fast isn't a single state — it's a sequence. Anabolic. Catabolic. Fat-burning. Ketosis. Deep ketosis. Fasting Well shows you exactly where you are in that journey, with stage-aware visuals and a quiet narration of what's happening inside. WHAT YOU GET (FREE) • Live timer with the ring you'll want to watch • Six built-in plans: 16:8, 18:6, 20:4, OMAD, 24h, 36h • Stage-aware progress: see Anabolic → Ketosis unfold • Notifications when you cross a stage or hit your goal • Journal of your last 30 days with a weekly chart • Five long-form science articles, beautifully illustrated • Calendar heatmap of recent activity • Dark and light themes that look right on every screen WHY ANOTHER FASTING APP Because the popular ones either gutted their free tier or never felt like apps you'd open without a reason. Fasting Well is built to be the home screen icon you actually like seeing. PRIVACY-FIRST Your fasts and weight data stay on your device — no account, no cloud sync, no servers we own. To make the app better we collect anonymous usage signals (e.g. "a fast was started on the 18:6 plan" or "an article was opened") through PostHog. These contain no personally identifying information and can be turned off entirely in Settings → Privacy. SCIENCE-BACKED, NOT WELLNESS-HYPE Built on peer-reviewed fasting research. No talk of "detox." No supplements to sell. Just the metabolic story your body is actually telling. FASTING WELL PRO Go deeper with Pro: build custom fasting protocols, log your weight and watch the trend, unlock advanced statistics (12-week heatmap, completion rate, best streak), share beautiful fast cards, and pick from every accent color. Pro is a monthly or annual subscription, or a one-time lifetime purchase — and the core tracker stays free forever. QUESTIONS, FEEDBACK hello@fastingwell.app We're a small team. Every email gets read. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fastingwell.app/privacy

About

WaterLoop

Features
Read full description

WaterLoop is a calm, beautifully designed hydration tracker that helps you build a consistent daily water habit. Log your water intake in seconds using quick-add presets or enter a custom amount. Watch your fluid orb fill throughout the day as you get closer to your goal. When you hit your target, WaterLoop celebrates the moment. FEATURES Fluid Progress Orb — a live visualization that rises as you hydrate, evolving in color from morning to goal Quick-Add Logging — tap once to log 100 mL, 250 mL, or 500 mL. Enter any custom amount instantly Daily Goal — set your personal hydration target in mL or oz Today's Log — see every entry for the day with swipe-to-delete Streaks — build daily consistency and track your longest streak Last 7 Days — a weekly bar chart and day-by-day breakdown of your intake Hydration Reminders — optional local notifications at your chosen frequency and start time Privacy First — everything stays on your device. No account, no cloud, no tracking WaterLoop is not a medical app. Always consult a healthcare professional for medical advice related to hydration.

Screenshots

Fasting Well4 screens
WaterLoop3 screens

Verdict

The call

Fasting Well and WaterLoop are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Fasting Well versus WaterLoop: the parameters behind the verdict, then further details
ParameterFasting WellWaterLoop
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size45 MB3 MB
Age rating4+4+
DeveloperGeneralizableKyrantis AI Technologies Inc.

In-app purchases

None

Fasting Well

No in-app purchases

None

WaterLoop

No in-app purchases

Questions

Is Fasting Well free?
Fasting Well is free to download, with no in-app purchases.
Is WaterLoop free?
WaterLoop is free to download, with no in-app purchases.
Do Fasting Well or WaterLoop have ads?
Neither Fasting Well nor WaterLoop shows ads.

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