Comparison

Nistis vs Fasting Tracker

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

Head to head
About

Nistis

This app helps you track fasting periods with customizable timers and editing capabilities. It offers a free version with core features and an optional one-time purchase for advanced functionalities like Apple Watch integration and health syncing.

Highlights
  • Customizable fasting timers (16:8, OMAD, etc.)
  • Editable fasting history
  • Stage timeline with common fasting phases
  • Offline functionality
  • Optional iCloud sync
  • Apple Watch app
  • Home screen and lock screen widgets
Features
Read full description

A fasting timer. That's it. Free to use, no account, no ads, no AI coach, no subscription required — upgrade once and keep it forever. Fix a forgotten fast in two taps. Your data stays on your device and exports any time. THE TIMER Pick a preset — 16:8, 18:6, 20:4, OMAD, 5:2 — or set a custom fast. One big ring shows elapsed, remaining, or percent; tap to switch. Started fasting before you opened the app? Adjust the start time mid-fast. Ending early or late? The end time is editable too. No lectures either way. YOUR HISTORY IS YOURS TO EDIT Every fasting app makes logging mistakes. Nistis is the one that lets you fix them: any fast, any field, any time — including days you forgot entirely. Tap an empty day, add the fast, done. Streaks and stats recompute instantly. No punishment screens. STAGES, NOT SERMONS A simple timeline shows the stages commonly associated with fasting — digesting, fat burning, ketosis ramp — with honest, hedged language and no medical claims. FREE MEANS FREE The timer, every preset, unlimited history with full editing, streaks, stats, notifications, and a home-screen widget. Free forever — in writing. Whatever ships free stays free. Available in 34 languages. NISTIS PRO — PAY ONCE IF YOU WANT MORE • Apple Watch app with complications — start and end from your wrist • Live Activity and Dynamic Island — your fast on the lock screen • Every widget style, including lock-screen widgets • Apple Health sync for weight and water • Advanced stats: trends, completion rate, weight overlay • Import from other fasting apps (first import free) and export any time $2.99/month, $14.99/year, or $29.99 once — yours for life. Other fasting apps charge $69.99 every year for less. PRIVATE BY ARCHITECTURE No account. No ads. No tracking SDKs. Works completely offline; optional iCloud sync uses your private iCloud, which we can't read. The only thing the app ever phones is Apple's purchase system. Check our App Store privacy label against any other fasting app — that's the whole pitch. Nistis — Greek νήστις, "the one who fasts." Pronounced NISS-tis. Not medical advice. Consult a doctor before changing your eating pattern. Privacy policy: https://nistis.com/privacy Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Fasting Tracker

Features
Read full description

Sablo is a fasting timer that stays out of your way. Start a fast, see exactly where you are, and get a nudge when you reach your goal. Begin with a 7-day free trial, then continue monthly or buy lifetime access once. Every feature is included either way. EVERYTHING IN SABLO • 16:8, 18:6, 20:4, OMAD and custom windows • Set the start time after the fact, so a fast you forgot to tap still counts • Edit or delete any past fast • Streaks and your current metabolic phase • A reminder when you reach your goal, and one before your eating window closes • Unlimited history • Trends, averages and completion rate • Home Screen and Lock Screen widgets, Live Activity and Dynamic Island • Weight logging, with optional Apple Health sync • Export your data as CSV whenever you want • Five accent themes IT ALL STAYS ON YOUR PHONE No account. No email. No sign-up. Your fasts never leave the device. That also means nothing to sync, and nothing to lose when you are offline. TWO WAYS TO PAY Start with a 7-day free trial and continue monthly, or pay once for lifetime access. The lifetime option costs less than three months of the subscription and never renews. Sablo describes the phases your body moves through while fasting. It is a timer and a log, not medical advice — talk to a doctor before changing how you eat. SUBSCRIPTION TERMS Sablo Premium is billed monthly, at the price shown in the app, after a 7-day free trial. Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within the 24 hours before the current period ends. You can manage or cancel it in Settings › Apple Account › Subscriptions. Any unused part of a free trial is forfeited if you buy the lifetime unlock. The lifetime unlock is a single purchase. It does not renew. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Nistis4 screens
Fasting Tracker4 screens

Verdict

The call

Nistis and Fasting Tracker 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. Nistis sells 3 in-app purchases, starting at $2.99 per month and Fasting Tracker sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 3, 2026 and October 16, 2026 respectively.

ScorecardNo meaningful differences
Nistis versus Fasting Tracker: the parameters behind the verdict, then further details
ParameterNistisFasting Tracker
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size18 MB9 MB
Age rating4+12+
DeveloperLittle Theta LLCSnir Tam

In-app purchases

3 purchases

Nistis

Subscriptions2
  • Pro Monthly$2.991 Month
  • Pro Annual7 Days trial$14.991 Year
One-time1
  • Pro Lifetime$19.99
2 purchases

Fasting Tracker

Subscriptions1
  • Monthly7 Days trial$7.991 Month
One-time1
  • Sablo Lifetime$19.99

Questions

Is Nistis free?
Nistis is free to download, with in-app purchases available.
Is Fasting Tracker free?
Fasting Tracker is free to download, with in-app purchases available.
Do Nistis or Fasting Tracker have ads?
Neither Nistis nor Fasting Tracker shows ads.
Which is updated more often, Nistis or Fasting Tracker?
Nistis ships an update every 2 weeks, and Fasting Tracker every 2 weeks. Most recently, Nistis was updated on October 3, 2026 and Fasting Tracker on October 16, 2026.

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