Comparison

Fasting Tracker vs FastKept

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

Head to head
About

Fasting Tracker

Features
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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/

About

FastKept

Features
Read full description

FastKept is a simple fasting timer that keeps your plans and your full history on your iPhone. You decide when a fast starts and ends. All features free. No account needed. YOUR FAST AT A GLANCE • A live timer ring with time to goal and when your fast ends; tap it to switch between elapsed, remaining and percent • Started earlier? Set the real start time • Your eating window, with when it opens and closes • The last 7 days and today's logs on the same screen • Finish a fast with an optional mood and note PLANS THAT FIT • 12:12, 13:11, 14:10, 16:8, 18:6, 20:4 and 23:1, Flexi with no goal, or your own custom length • A weekly schedule with a different plan on some days, and rest days • Low-intake days for a 5:2 week • Name and save your own plans EVERY FAST IN YOUR HISTORY • Week, month and year charts, and a calendar of every day • A last-16-weeks view • Rolling 7 to 365 days, plus your all-time totals • Add a missed fast or edit the times; overlapping fasts are checked • A consistency count that allows breaks and never rewards fasting longer than your plan OPTIONAL LOGS • Weight, with a weekly trend and a rough date for your goal • Water and drinks, with a daily goal • Ketones, glucose, electrolytes, notes and progress photos that stay on your iPhone • Logs you don't use stay hidden REMINDERS YOU CHOOSE • Planned start, goal reached, 1 hour to goal, eating window opening and closing, weigh-ins and water • See every upcoming reminder in one list MORE • Home Screen and Lock Screen widgets, and a Live Activity in the Dynamic Island • Siri: "Start my fast" and "End my fast" • Apple Health (optional): save weight and water, and read your weight • App lock • Export to CSV or one backup file, and restore it • Light and dark themes, and larger text PRIVATE BY DESIGN Your fasts and logs are stored on your iPhone and are never sold or used for ads. An optional account (18+) can back up your records; progress photos are never uploaded. FREE, WITH AN OPTIONAL AD-FREE PLAN All features are free. The free version shows occasional, dismissible promotions for our own apps only, with no third-party ads. An optional subscription (weekly, monthly or yearly) removes all ads in all our apps on this iPhone. It unlocks no extra features. Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel them in your Apple Account settings. Deleting the app doesn't cancel a subscription. IMPORTANT FastKept is a timer and log, not medical advice. It doesn't measure ketosis or any other body state. It isn't for people under 18, pregnant or breastfeeding, underweight, or with a current or past eating disorder. Talk to a doctor before you start or change a fasting routine, especially if you have diabetes or another medical condition or take medication. Drink water, and stop fasting and eat if you feel dizzy, faint, shaky or unwell. Terms of Use: https://fastkept.com/terms/ Privacy Policy: https://fastkept.com/privacy/

Screenshots

Fasting Tracker4 screens
FastKept4 screens

Verdict

The call

Fasting Tracker and FastKept 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 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. Fasting Tracker sells 2 in-app purchases, starting at $7.99 per month and FastKept sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Fasting Tracker versus FastKept: the parameters behind the verdict, then further details
ParameterFasting TrackerFastKept
PriceFreeFree
Update frequencyEvery 2 weeks—
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details — not scored
Size9 MB4 MB
Age rating12+4+
DeveloperSnir TamTimothy Hess

In-app purchases

2 purchases

Fasting Tracker

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

FastKept

Subscriptions3
  • Ad-free Supporter Weekly$0.997 Days
  • Ad-free Supporter Monthly$2.991 Month
  • Ad-free Supporter Yearly$19.991 Year

Questions

Is Fasting Tracker free?
Fasting Tracker is free to download, with in-app purchases available.
Is FastKept free?
FastKept is free to download, with in-app purchases available.
Do Fasting Tracker or FastKept have ads?
Neither Fasting Tracker nor FastKept shows ads.

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