Comparison

Fastly vs Fasting Timer by TrainerDay

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

Head to head
About

Fastly

This app provides a clean and distraction-free timer for intermittent fasting. It tracks your fasting periods in real-time, offers various popular fasting plans, and automatically monitors fasting phases like fat burning and ketosis. View your history with clear statistics and receive smart reminders.

Highlights
  • Clean fasting timer with real-time tracking
  • Multiple intermittent fasting plans
  • Automatic fasting phase tracking
  • Fasting history with statistics
  • Smart reminders for goals
  • Minimalist interface
  • Dark mode support
Features
Read full description

Fastly is a clean, private fasting timer for 16:8, 18:6, OMAD, and custom schedules—without ads, accounts, or distractions. Start a fast with one tap, adjust your start or end time when needed, and see your elapsed time, remaining time, and planned finish at a glance. Fastly keeps the experience focused while giving you the tools you need to understand your routine and track your progress. FOLLOW YOUR FAST See estimated fasting phases based on your elapsed fasting time, including digestion, fat burning, ketosis, and autophagy. Upcoming phase markers make it easy to see what comes next during your fast. TRACK YOUR PROGRESS Review your complete fasting history through clear statistics, charts, and progress insights. Set weight and body fat goals, and optionally connect Apple Health to keep your measurements organized. STAY ON TRACK EVERYWHERE Follow your fasting status from your iPhone, Apple Watch, Home Screen widgets, and complications. Smart reminders help you stay aware of fasting goals and eating windows without unnecessary interruptions. KEY FEATURES • Real-time fasting timer with elapsed and remaining time • Planned fasting end time displayed at a glance • 14:10, 16:8, 18:6, 20:4, OMAD, and custom plans • Estimated fasting phases for digestion, fat burning, ketosis, and autophagy • Upcoming fasting phase markers • Complete fasting history with statistics and charts • Weight and body fat goals with progress benchmarks • Apple Health integration for weight and body fat • Apple Watch app and complications • Home Screen widgets for quick progress checks • Smart fasting and eating-window reminders • Optional private iCloud synchronization • Dark mode and a clean, focused interface PRIVATE BY DESIGN No ads. No third-party analytics. No developer data collection. Your fasting and health information stays on your devices and, when optional synchronization is enabled, in your private iCloud account. IMPORTANT NOTE Fasting phases are estimates based on elapsed time and can vary from person to person. Fastly is intended for general wellness and fasting tracking only. It does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before making medical or dietary decisions.

About

Fasting Timer by TrainerDay

This app simplifies intermittent fasting with a one-tap start and customizable durations. Track your progress visually and review your fasting history. It's designed for easy habit building without complex features.

Highlights
  • One-tap fast start
  • Customizable fasting durations
  • Flexible start times
  • Visual progress tracking
  • Fasting history
  • Shareable results
Features
Read full description

Fasting Timer is a simple, no-fuss intermittent fasting tracker designed to help you build healthy fasting habits. It's the ultimate app for ADF fasters. Each day when you start your fast. It's just one click, even when you forget to start it at your normal fasting time. Features: • One-tap start - Begin your fast instantly • Customizable durations - Set your preferred fasting window (12, 14, 16, 18, 20+ hours) • Flexible start times - Start now or schedule for later • Visual progress - See your fasting progress at a glance • History tracking - Review your completed fasts • Share your achievements - Export and share your fasting results Whether you're doing 16:8, 18:6, or any other intermittent fasting schedule, this app makes it easy to track your fasting windows without complicated setup or unnecessary features. Free and simple. Start fasting today.

Screenshots

Fastly4 screens
Fasting Timer by TrainerDay4 screens

Verdict

The call

The clearest difference is in-app purchases: Fasting Timer by TrainerDay at none against Fastly's 4. Fasting Timer by TrainerDay also leads on rating (5.0 vs 4.8) and iOS requirement (15.1 vs 17.6). Fastly's advantage is ratings volume (92 vs 12). On price, review sentiment, ads and device support 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. Fastly sells 4 one-off in-app purchases. Fasting Timer by TrainerDay asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fasting Timer by TrainerDay holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Fastly has 92 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 94% of Fastly's written reviews are positive against 100% of Fasting Timer by TrainerDay's.

Scorecard5 real differences · 5 level
Fastly versus Fasting Timer by TrainerDay: the parameters behind the verdict, then further details
ParameterFastlyFasting Timer by TrainerDay
PriceFreeFree
Rating4.8 (92 ratings)5.0 (12 ratings) — better
Positive reviews94.1% of reviews100.0% of reviews — better
Number of ratings92 — better12
Update frequencyEvery 10 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size9 MB30 MB
Age rating12+17+
DeveloperCollweb LLCTrainerDay Inc

Customer experience

Fastly

All ratings92 ratings
Positive95.7%
Neutral3.3%
Negative1.1%
Written reviews34 reviews
Positive94.1%
Neutral5.9%
Negative0.0%

Fasting Timer by TrainerDay

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Fastly

One-time4
  • Coffee$1.99
  • Lunch$4.99
  • Become a Supporter$4.99
Show 1 more
  • Dinner$9.99
None

Fasting Timer by TrainerDay

No in-app purchases

Questions

Is Fastly free?
Fastly is free to download, with in-app purchases available.
Is Fasting Timer by TrainerDay free?
Fasting Timer by TrainerDay is free to download, with no in-app purchases.
Which has better reviews, Fastly or Fasting Timer by TrainerDay?
Fasting Timer by TrainerDay is rated higher. Fastly averages 4.8 out of 5 from 92 ratings, while Fasting Timer by TrainerDay averages 5.0 from 12 ratings.
Do Fastly or Fasting Timer by TrainerDay have ads?
Neither Fastly nor Fasting Timer by TrainerDay shows ads.

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