Comparison

Fastly vs FastLine

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

FastLine

Features
Read full description

FastLine is the intermittent fasting timer that does the one thing you actually open the app for — beautifully — and doesn't charge you $70 a year for a countdown. Start a fast and a clean count-up ring shows your elapsed time, your current stage, and how long until your goal. It lives where you'll actually see it: on your Lock Screen and in the Dynamic Island as a Live Activity, and on your Home Screen as a widget. No need to keep opening the app. HONEST PRICING The timer, fasting stages, history and stats are free, forever. Pro is an optional upgrade at a fair price — about twenty dollars a year, or a one-time lifetime unlock — not a $70 subscription hidden behind a countdown. WHAT YOU GET, FREE • Count-up fasting ring with time elapsed and time remaining • Popular protocols: 16:8, 18:6, 20:4 and OMAD • Live Activity on the Lock Screen + Dynamic Island • Home Screen widget • Educational fasting stages as the hours pass • History, current streak, averages and a 14-day chart PRO (OPTIONAL) • Custom fasting goals — set your own hours • Mood & energy notes on every fast • Weight trend from Apple Health • Export your history to CSV ON YOUR WRIST Glance at your fast on Apple Watch and start or end it without reaching for your phone. PRIVATE BY DEFAULT No account. No backend. Your fasts stay on your device. FastLine reads your weight from Apple Health only if you turn it on, and never writes your data anywhere. A NOTE ON HEALTH FastLine is an educational tracking tool, not medical advice. Fasting isn't right for everyone — talk to a doctor before making changes, especially if you are pregnant, nursing, taking medication, or have a history of disordered eating. Privacy Policy: https://moathothman.github.io/ExploringIdeas-legal/fastline/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Fastly4 screens
FastLine4 screens

Verdict

The call

The clearest difference is update cadence: Fastly at every 10 days against FastLine's monthly. On price, ads, in-app purchases 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 and FastLine sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Fastly ships an update every 10 days, FastLine monthly. The most recent releases landed on September 27, 2026 and September 10, 2026 respectively.

Scorecard1 real difference · 9 level
Fastly versus FastLine: the parameters behind the verdict, then further details
ParameterFastlyFastLine
PriceFreeFree
Rating4.8 (92 ratings) — better—
Positive reviews94.1% of reviews—
Number of ratings92 — better—
Update frequencyEvery 10 days — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, Apple WatchiPhone, Apple Watch
Requires iOS17.617.0 — better
Further details — not scored
Size9 MB13 MB
Age rating12+4+
DeveloperCollweb LLCMoaath Othman

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
3 purchases

FastLine

Subscriptions2
  • Pro Monthly7 Days trial$2.991 Month
  • FastLine Pro14 Days trial$19.991 Year
One-time1
  • FastLine Pro$29.99

Questions

Is Fastly free?
Fastly is free to download, with in-app purchases available.
Is FastLine free?
FastLine is free to download, with in-app purchases available.
Do Fastly or FastLine have ads?
Neither Fastly nor FastLine shows ads.
Which is updated more often, Fastly or FastLine?
Fastly ships an update every 10 days, and FastLine monthly. Most recently, Fastly was updated on September 27, 2026 and FastLine on September 10, 2026.

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