Fasti vs Fastly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fasti
This app offers a simple and beautiful intermittent fasting timer with AI coaching to help users stay motivated and informed. It tracks fasts, indicates fat burn periods, and provides progress visualization and educational guidance.
- Fasting timer with start, pause, and complete functions
- Maximum Fat Burn Indicator
- Customizable motivational posters
- Weekly and calendar progress views
- AI-powered fasting guidance
- Clean and simple user interface
Read full descriptionHide full description
Fasti: Fasting Tracker & Timer Your simple, beautiful fasting timer with AI coaching to help you stay consistent, motivated, and informed. Whether you’re new to intermittent fasting or building a long-term routine, Fasti makes fasting easy to understand and effortless to follow. Track your fast with confidence Use Fasti’s fasting timer tracker to start, pause, and complete fasts with ease. A clean, distraction-free design helps you focus on your goal without complexity. Know when fat burn begins Fasti includes a Maximum Fat Burn Indicator to help you understand when your body reaches peak ketosis. Learn how your fasting window aligns with fat burning and metabolic benefits without guesswork. Stay motivated every day Build consistency with a custom motivational poster that combines uplifting visuals and encouraging text. Designed to keep you inspired during long fasts and busy days. See your progress over time Track your journey with weekly and calendar-based progress views. Visualize completed fasts, streaks, and trends so you can stay accountable and motivated. Learn with your personal AI fasting coach Have questions about fasting? Fasti’s AI fasting coach helps you learn more about intermittent fasting schedules, fat burning, ketosis, and best practices. Designed to be simple and beautiful Fasti is built with a clean, modern UI that’s easy to use and calming to look at. No clutter. No overwhelm. Just a fasting companion that fits into your day. Why users choose Fasti • Easy-to-use fasting timer • Fat burn and ketosis insights • Daily motivation and encouragement • Weekly and calendar progress tracking • AI-powered fasting guidance Start your fasting journey today Download Fasti: Fasting Timer and take the guesswork out of intermittent fasting with clarity, motivation, and support. Fasti: Fasting Tracker & Timer includes a free version and an optional subscription for premium features. A free trial is available. Download Fasti: Fasting Tracker & Timer to get started. Payment for Fasti+ will be charged to your iTunes Account when you subscribe. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period Manage your subscription by going to your Account Settings. Read more terms & conditions: Terms of use: https://www.stierapps.com/fasti_terms Privacy policy: https://www.stierapps.com/fasti_privacy_policy
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.
- 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
Read full descriptionHide 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.
Screenshots
Verdict
The clearest difference is update cadence: Fasti at daily against Fastly's every 10 days. Fastly's advantage is ratings volume (92 vs 15). On price, rating, review sentiment and ads 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
Both are free to download. Fasti sells 2 in-app purchases, starting at $9.99 per month and Fastly sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.9 for Fasti against 4.8 for Fastly. That said, the two scores are not equally well evidenced: Fastly has 92 ratings behind it against 15, so its average is the more settled of the two. Written reviews are what separate them: 100% of Fasti's written reviews are positive against 94% of Fastly's.
Fasti ships an update daily, Fastly every 10 days. The most recent releases landed on September 14, 2026 and September 23, 2026 respectively.
| Parameter | Fasti | Fastly |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (15 ratings) — better | 4.8 (92 ratings) |
| Positive reviews | 100.0% of reviews — better | 94.1% of reviews |
| Number of ratings | 15 | 92 — better |
| Update frequency | Daily — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone | iPhone, Apple Watch — better |
| Requires iOS | 17.6 | 17.6 |
| Further details — not scored | ||
| Size | 23 MB | 9 MB |
| Age rating | 4+ | 12+ |
| Developer | Stellar Apps, Limited Liability Company | Collweb LLC |
Customer experience
Fasti
Fastly
In-app purchases
Fasti
- Fasti+ Monthly$9.991 Month
- Fasti+ Annual$69.991 Year
Fastly
- Coffee$1.99
- Lunch$4.99
- Become a Supporter$4.99
Show 1 moreShow fewer
- Dinner$9.99





