Comparison

Fastly vs Hold Fast

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

Hold Fast

This app provides a clean and reliable timer for intermittent fasting. It offers customizable plans, progress tracking, and live activity updates without ads or clutter. Focus on your fasting goals with an intuitive interface.

Highlights
  • One-tap fasting start
  • Live Activity and Dynamic Island timer
  • Home and Lock Screen widgets
  • Popular fasting plans included
  • Sun Up to Sun Down plan
  • Fasting history and trend charts
  • Start and goal reminders
Features
Read full description

Fasting works. Remembering when you started, when to stop, and whether you're on track? That's the hard part. Hold Fast makes it effortless. Whatever your reason for fasting, Hold Fast keeps up. Some people fast to manage their weight. Others do it for metabolic health, steady energy, sharper focus, longevity, spiritual practice, or simply the discipline of it. Hold Fast doesn't push one goal on you. It just tracks your fast, cleanly and reliably, so you can focus on why you started. Tap once to start your fast. Watch the timer count up on your Home Screen, Lock Screen, and Dynamic Island, without even opening the app. Hit your goal, log the win, and build a streak you can actually see. That's the whole idea: a fasting app that gets out of your way. No noise, no clutter, no ads. Just a clean timer and the data that keeps you consistent. WHY YOU'LL STICK WITH IT • One tap to start, so your fast is always a glance away • Popular plans built in: 14:10, 16:8, 18:6, 20:4, and OMAD • A unique Sun Up to Sun Down plan that tracks your fast to local sunrise and sunset • Streaks and history that make progress feel real and keep you coming back FEATURES • Live Activity and Dynamic Island for real-time progress • Home Screen and Lock Screen widgets in every size • Full fasting history with a month calendar and weekly trend charts • Start and goal reminders so you never miss your window • Private by design. Your data syncs across your devices through your own iCloud, never our servers • Export your complete history to CSV anytime • Sign in with Apple, or just start as a guest • Beautiful in dark mode, with full Dynamic Type support HOLD FAST PRO Go further with a Pro subscription: • Monthly: $2.99 per month • Yearly: $19.99 per year (best value) • Start free with a 7-day trial Payment will be charged to your Apple Account at confirmation of purchase. Your subscription automatically renews unless it is canceled at least 24 hours before the end of the current period, and your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription anytime in your Apple Account settings. Start your first fast today, and finally hold fast. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://holdfasthq.app/privacy Questions or feedback? Email support@holdfasthq.app. We read every message.

Screenshots

Fastly4 screens
Hold Fast4 screens

Verdict

The call

The clearest difference is ratings volume: Fastly at 92 against Hold Fast's 2. Hold Fast's advantage is rating (5.0 vs 4.8) and update cadence (every 5 days vs every 10 days). On price, ads, in-app purchases and monetization model 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 Hold Fast sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Hold Fast 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 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Fastly ships an update every 10 days, Hold Fast every 5 days. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Fastly versus Hold Fast: the parameters behind the verdict, then further details
ParameterFastlyHold Fast
PriceFreeFree
Rating4.8 (92 ratings)5.0 (2 ratings) — better
Positive reviews94.1% of reviews—
Number of ratings92 — better2
Update frequencyEvery 10 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS17.6 — better18.0
Further details — not scored
Size9 MB10 MB
Age rating12+12+
DeveloperCollweb LLCByron Soto

Customer experience

Fastly

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

Hold Fast

All ratings2 ratings
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
2 purchases

Hold Fast

Subscriptions2
  • Monthly$2.991 Month
  • Yearly$19.991 Year

Questions

Is Fastly free?
Fastly is free to download, with in-app purchases available.
Is Hold Fast free?
Hold Fast is free to download, with in-app purchases available.
Which has better reviews, Fastly or Hold Fast?
Hold Fast is rated higher. Fastly averages 4.8 out of 5 from 92 ratings, while Hold Fast averages 5.0 from 2 ratings.
Do Fastly or Hold Fast have ads?
Neither Fastly nor Hold Fast shows ads.
Which is updated more often, Fastly or Hold Fast?
Fastly ships an update every 10 days, and Hold Fast every 5 days. Most recently, Fastly was updated on October 6, 2026 and Hold Fast on October 1, 2026.

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