Comparison

xHours vs WaterFast

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

Head to head
About

xHours

Features
Read full description

Turn intermittent fasting into a simple, visual habit. No more "can I eat yet?" A 24-hour ring shows where you are in your day, how long you've fasted, and when your eating window opens — so you can stop watching the clock and just live. Life isn't rigid, and neither is xHours. Ate early? Pushed your fast longer? Switch phase with a tap. Need a day off? Pause without breaking your stats. Set your schedule once and the app carries it, day after day. And it's yours. No account. No ads. No subscription. Nothing leaves your phone. Even Apple Watch is included — free. TRY EVERY PREMIUM FEATURE FREE FOR 7 DAYS Statistics, Live Activity, custom alarms, the fasting guide, weekly programs, metabolic phases and full personalization — all unlocked from day one. No card required. When the trial ends, the core app stays free, forever. WHY YOU'LL LIKE IT - Set it and forget the timer — pick a schedule and start time, xHours handles the phases automatically - Your whole day at a glance — a visual 24-hour ring with clear fasting and eating colors - Fasting that bends to your life — 12:12, 14:10, 16:8, 18:6, 20:4, OMAD or any custom plan - Change your mind anytime — switch phase with a tap, or pause on non-fasting days without disrupting your stats - On your wrist, free — full Apple Watch sync at no extra cost - Always in view — Home Screen widget keeps your timer one look away - Truly private — no account, no ads, nothing collected; everything stays on your device - Speaks your language — 22 languages PREMIUM Unlock with the 7-day trial or a one-time purchase: - Weekly programs — a different plan for each day, with its own schedule and rest days - Metabolic phases — follow your fasting phases on the ring (fed state, ketosis, autophagy). General estimates, not medical advice - Lock Screen widgets — your fast in view the moment you pick up your phone - Live Activity — your timer in the Dynamic Island and on the Lock Screen, no need to open the app - Statistics & history — streaks, averages and charts to watch your progress grow - Custom alarms — your own sounds for the end of a fast and the start of a new cycle - Fasting guide — the pros and cons of each schedule (16:8, 18:6, OMAD…) - Full personalization — recolor the ring, rename phases, save your presets PRICING - One-time purchase: unlock Premium forever - No subscription, no renewals - 7-day free trial included IMPORTANT xHours is a support tool and is not a substitute for medical advice. Talk to a healthcare professional before starting any fasting routine — especially if you are pregnant, breastfeeding, taking medication, or have a medical condition or a history of eating disorders. Terms of Service: https://smallappstudio.com/xHours/terms.html Privacy: https://smallappstudio.com/xHours/privacy.html Contact: support@smallappstudio.com

About

WaterFast

This app provides a synchronized intermittent fasting timer designed for seamless use across your iPhone and Apple Watch. It offers detailed insights into fasting zones and hydration tracking, with a focus on privacy and a user-friendly experience.

Highlights
  • Synchronized iPhone and Apple Watch timer
  • Fasting zone insights
  • Hydration tracking
  • Multiple fasting plans
  • Streak calendar
  • Data export
Features
Read full description

Some fasting apps charge many times more. WaterFast is a fraction of that — with a 3-day free trial on every plan. You decide. FASTING APPS HAVE A PROBLEM They're either overpriced, bloated with social feeds and AI coaching you never asked for — or they're simple but their Apple Watch app runs a separate countdown that drifts out of sync with your iPhone. Two timers for the same fast. Not optimal. WATERFAST IS DIFFERENT One timer. One source of truth. Your Watch doesn't follow your iPhone — it leads. Start, monitor and end your fast right from your wrist, even with your iPhone in your pocket. When you pick it up, everything matches. Always. To the second. TRY IT ALL FREE FOR 3 DAYS Start a 3-day free trial and unlock everything — no strings attached. Then keep it monthly, yearly, or one-time lifetime. Cancel anytime. EVERYTHING INCLUDED • Every plan: 16:8, 18:6, 20:4, OMAD, 5:2 and fully custom • Start & stop fasts from Apple Watch — it leads, iPhone follows • Live timer with progress ring and fasting zones • Streak calendar — don't break the chain, unlimited history • All Apple Watch complications (circular, corner, inline, rectangular) • Hydration tracking with one-tap logging and daily goal • Full stats: current streak, longest fast, total hours, success rate • Export your data as CSV • No account required BUILT FOR APPLE WATCH — REALLY Most fasting apps treat the Watch as an afterthought. WaterFast was designed wrist-first. The timer state lives in one shared place: start a fast on your Watch during dinner, check the zone on your iPhone the next morning — same fast, same seconds, zero drift. KNOW YOUR FASTING ZONES Track exactly what's happening in your body — from digestion through fat burning and ketosis to autophagy. Each zone explained in plain language, with science-based hour ranges. Educational reference only — not medical advice. HYDRATION, ON YOUR WRIST Log a glass of water with one tap on your Watch, with haptic confirmation, synced instantly to your iPhone and Apple Health. A PRICE THAT RESPECTS YOU WaterFast PRO: monthly, yearly, or one-time lifetime. Every plan starts with a 3-day free trial. We think a fasting timer shouldn't cost more than your streaming service. PRIVATE BY DESIGN No account. No ads. No tracking. Your fasting and hydration data never leaves your device (except to your own Apple Health, if you choose). Start your 3-day free trial and run your first fast in under a minute. --- Medical disclaimer: WaterFast provides educational information about fasting. It is not medical advice. Consult your healthcare provider before starting any fasting protocol, especially if you have a medical condition, are pregnant, or take medication. --- Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

xHours4 screens
WaterFast4 screens

Verdict

The call

xHours and WaterFast 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 · 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. xHours sells 2 in-app purchases, starting at $2.99 per month and WaterFast sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

xHours ships an update every 9 days, WaterFast weekly. The most recent releases landed on October 24, 2026 and November 5, 2026 respectively.

ScorecardNo meaningful differences
xHours versus WaterFast: the parameters behind the verdict, then further details
ParameterxHoursWaterFast
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 9 daysWeekly — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, Apple WatchiPhone, Apple Watch
Requires iOS18.017.0 — better
Further details — not scored
Size9 MB3 MB
Age rating4++4
DeveloperNicola RadaelliLUIS ORLANDO LAZO GONZALEZ

In-app purchases

2 purchases

xHours

Subscriptions2
  • xHours Premium Monthly$2.991 Month
  • xHours Premium Yearly$19.991 Year
3 purchases

WaterFast

Subscriptions2
  • WaterFast PRO Monthly3 Days trial$2.991 Month
  • WaterFast PRO Yearly3 Days trial$9.991 Year
One-time1
  • WaterFast PRO Lifetime$24.99

Questions

Is xHours free?
xHours is free to download, with in-app purchases available.
Is WaterFast free?
WaterFast is free to download, with in-app purchases available.
Do xHours or WaterFast have ads?
Neither xHours nor WaterFast shows ads.
Which is updated more often, xHours or WaterFast?
xHours ships an update every 9 days, and WaterFast weekly. Most recently, xHours was updated on October 24, 2026 and WaterFast on November 5, 2026.

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