Comparison

Trajectory 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

Trajectory

Read full description

Trajectory focuses on long-term direction instead of daily noise, so you can stay consistent without overreacting. TRACK YOUR WEIGHT EFFORTLESSLY • Log your weight in seconds • Supports kg and lbs • Full history STAY ON COURSE • Set a target weight and deadline • See your personal trajectory line • Know exactly where you should be today UNDERSTAND YOUR BODY • BMI tracking with instant feedback • 7-day trend to spot momentum • Progress toward your goal CLEAN & FOCUSED • No subscriptions. Free. • Beautiful chart that tells the whole story Trajectory doesn't judge. It doesn't nag. It just shows you the path, and whether you're on it.

About

Fasting Tracker

This app offers a simple, one-tap timer for intermittent fasting with customizable windows and a built-in water tracker. It provides clear explanations of fasting zones and integrates with Apple Health for weight and hydration tracking. Your data remains private and on your device.

Highlights
  • One-tap intermittent fasting timer
  • Customizable fasting windows
  • Built-in water tracker
  • Fasting zone explanations
  • Apple Health integration
  • Live Activity and widgets
Features
Read full description

FastTrack is intermittent fasting the honest way. No subscription required, no onboarding quiz, and no AI coach reading your data. Just a beautiful one-tap timer, with a built-in water tracker, that respects your time and your privacy. WHY FASTTRACK Most fasting apps hide the basics behind a $70-per-year subscription and a long quiz before you can even start a timer. FastTrack flips that. Buy it once and own it for life, or pick a low weekly or annual plan if you prefer. Everything runs on your device. There is no account and nothing to sign up for. FAST YOUR WAY - One-tap timer with a live progress ring - Every protocol: 16:8, 18:6, 20:4 and OMAD - Gentle, circadian-friendly presets (12:12 and 14:10) for easing in or fasting alongside GLP-1 medication - Custom windows up to 24 hours - Forgot to tap? Edit your start and end times anytime SEE WHAT FASTING DOES - A plain-language fasting-zone timeline: fed, fat burning, ketosis and beyond - Clear, everyday explanations, never medical jargon A MODERN iOS APP - Live Activity and Dynamic Island countdown - Lock screen and home screen widgets - Streaks, history calendar and stats (average fast, longest fast, weekly consistency) - Apple Health weight sync with a weight-and-fasting trend STAY HYDRATED WHILE YOU FAST - One-tap water logging: 250, 500 or 750 ml (or fl oz), plus custom amounts and undo - A daily water goal you set, with a progress ring and how much is left - A hydration streak for every day you hit your goal - 7-day hydration history at a glance - Optionally save each drink to Apple Health as dietary water PRIVATE BY DESIGN Your fasting data never leaves your device. No account, no tracking, no ads. FASTING SAFELY FastTrack is an educational timer, not medical advice, and it never rewards extreme fasts. Fasting is not right for everyone. If you are pregnant, under 18, take medication, or have a history of disordered eating or a health condition, please talk to a clinician first. This app offers a weekly subscription with a 3-day free trial, and an annual subscription, plus a one-time lifetime purchase. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel subscriptions in your Apple ID Account Settings. Restore purchases from the app settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.appharbour.com/fasttrack/privacy.html

Screenshots

Fasting Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: Trajectory at none against Fasting Tracker's 3. On price and iOS requirement there is nothing between them.

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. Fasting Tracker sells 3 in-app purchases, starting at $3.99 per 7 days. Trajectory asks for nothing beyond the download.

Scorecard1 real difference · 8 level
Trajectory versus Fasting Tracker: the parameters behind the verdict, then further details
ParameterTrajectoryFasting Tracker
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequency—Every 2 months
Ads—No
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
Devices—iPhone — better
Requires iOS18.517.0 — better
Further details — not scored
Size2 MB1 MB
Age rating17+4+
DeveloperMathieu BonteApp Harbour ApS

In-app purchases

None

Trajectory

No in-app purchases

3 purchases

Fasting Tracker

Subscriptions2
  • Weekly Premium3 Days trial$3.997 Days
  • Annual Premium$19.991 Year
One-time1
  • Lifetime Unlock$29.99

Questions

Is Trajectory free?
Trajectory is free to download, with no in-app purchases.
Is Fasting Tracker free?
Fasting Tracker is free to download, with in-app purchases available.

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