Comparison

Waterfaster vs Fasting Tracker & 16

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

Head to head
About

Waterfaster

Features
Read full description

Water fasting and intermittent fasting, made clear — and no longer something you do alone. Start a fast with one tap and watch the live countdown on your Lock Screen, in the Dynamic Island and on your Home Screen widget. Follow what your body is doing hour by hour — fat burning, ketosis, cellular regeneration — based on published research. FAST TOGETHER — ANONYMOUS BY DESIGN • Live: see how many people are fasting with you right now • Your Circle: add friends with a simple code, follow their fast live, send boosts and friendly nudges • Groups & challenges: chase one goal together — from a 16:8 streak to a 7-day reset • No profiles, no photos, no feed of strangers. You appear under a generated water name unless you choose otherwise. YOU DECIDE WHO SEES YOU Share everything, hide from one specific friend, or go invisible completely. One tap, any time. NEVER LOSE YOUR PROGRESS Link Apple or Google and restore your history, stats and circle on any device. PICK YOUR PROTOCOL • Intermittent: 12:12, 14:10, 16:8, 18:6, 20:4 and OMAD • Water fasting: 24h, 36h, 48h, 72h, 4, 5 and 7 days • Flex: set or move your finish time while the fast is running ALSO INSIDE • Live Activity, Lock Screen and Home Screen widgets • Apple Health: steps, sleep, heart rate, weight and water • Hydration and electrolyte guidance during longer fasts • Streaks, trends and your full weight history • Personal insights and reminders you stay in control of Waterfaster is not medical advice. Talk to your doctor before longer fasts, and never fast on medication without medical guidance. — Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://waterfaster.app/terms Privacy Policy: https://waterfaster.app/privacy

About

Fasting Tracker & 16

Features
Read full description

FastPace is a one-tap intermittent fasting timer, kept deliberately simple. Pick your fasting window — 12:12, 14:10, 16:8, 18:6 or 20:4 — and start your fast with a single tap. The countdown lives on your lock screen and in the Dynamic Island, so you always know where you stand without opening the app. WHAT YOU GET, FREE FOREVER • The timer with every fasting window, unlimited • Lock-screen countdown (Live Activity) • The current fasting phase, explained in plain words • Daily streak and week view • Water and weight logging, one-handed FASTPACE+ (optional upgrade) • Full fasting history and statistics • Phase-by-phase insight detail • Water and weight charts • Widget options HONEST BY DESIGN • No account — there is nothing to sign up for • No ads, no third-party analytics • Works fully offline • Your fasts, water and weight stay on your phone. FastPace has no servers. • Pay once for lifetime access or pick the weekly plan — both shown side by side. No free trial, no surprises. A note on health: FastPace is an educational tool, not medical advice. Fasting is not suitable for everyone — talk to your doctor first, and do not fast if you are pregnant, nursing, underage or have a history of eating disorders.

Screenshots

Waterfaster4 screens
Fasting Tracker & 164 screens

Verdict

The call

Waterfaster and Fasting Tracker & 16 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

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

Both are free to download. Waterfaster sells 3 in-app purchases, starting at $3.99 per 7 days and Fasting Tracker & 16 sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Waterfaster ships an update every 11 days, Fasting Tracker & 16 every 2 weeks. The most recent releases landed on October 5, 2026 and October 14, 2026 respectively.

ScorecardNo meaningful differences
Waterfaster versus Fasting Tracker & 16: the parameters behind the verdict, then further details
ParameterWaterfasterFasting Tracker & 16
PriceFreeFree
Update frequencyEvery 11 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS16.4 — better17.0
Further details — not scored
Size59 MB10 MB
Age rating17+12+
DeveloperAMIT SolutionsAli Dinc

In-app purchases

3 purchases

Waterfaster

Subscriptions2
  • Waterfaster+3 Days trial$3.997 Days
  • Waterfaster+$44.991 Year
One-time1
  • Lifetime$89.99
2 purchases

Fasting Tracker & 16

Subscriptions2
  • FastPace+ Monthly$6.991 Month
  • FastPace+ Yearly$24.991 Year

Questions

Is Waterfaster free?
Waterfaster is free to download, with in-app purchases available.
Is Fasting Tracker & 16 free?
Fasting Tracker & 16 is free to download, with in-app purchases available.
Do Waterfaster or Fasting Tracker & 16 have ads?
Neither Waterfaster nor Fasting Tracker & 16 shows ads.
Which is updated more often, Waterfaster or Fasting Tracker & 16?
Waterfaster ships an update every 11 days, and Fasting Tracker & 16 every 2 weeks. Most recently, Waterfaster was updated on October 5, 2026 and Fasting Tracker & 16 on October 14, 2026.

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