Comparison

FastIQ vs Fasting Center

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

Head to head
About

FastIQ

This app combines intermittent fasting tracking with AI-powered calorie counting. Simply take a photo of your meal for instant logging of calories and macros. It helps you manage fasting schedules, track progress, and learn about nutrition for lasting results.

Highlights
  • AI food logging via photo
  • Intermittent fasting timer
  • Customizable fasting schedules
  • Calorie and macro tracking
  • Weight and progress charts
  • Bite-sized nutrition lessons
Features
Read full description

FastIQ is the intermittent fasting tracker that finally connects your fasting window, your meals, and the science behind both — so you actually understand what your body is doing. FASTING, MADE CLEAR • Start, stop, and edit fasts with a clean timer and flexible eating windows • Watch a live, hour-by-hour view of your metabolic state — from fed state and glycogen depletion to fat burning, ketosis, and autophagy • Choose a schedule that fits your life: 16:8, custom windows, or open-ended fasts • Smart notifications for when your fast starts, ends, and hits key milestones CALORIE & MACRO TRACKING — POWERED BY AI • Snap a photo of your meal and get an instant calorie and macro estimate • Scan a nutrition label or barcode to log packaged food in seconds • See protein, carbs, and fat at a glance with a clean daily macro ring • Search foods or add them manually — AI is optional, you're always in control LEARN AS YOU GO • 30+ bite-sized lessons on fasting, metabolism, macros, and habits • Evidence-informed, plain-English explanations — no hype, no fads • Topics like protein priority, breaking a fast, autophagy, plateaus, electrolytes, and metabolic flexibility PROGRESS YOU CAN SEE • Track weight toward your goal with clear progress visuals • Review your fasting and meal history day by day • Advanced analytics to spot the patterns that work for you FAST TOGETHER • Join a hosted group fast from a shared link and start at the same time, in your own timezone • See who else is fasting right now and cheer them on • A monthly and yearly leaderboard for fasts that hit their own goal • Pick a display name and avatar — your email is never shown PRIVATE & YOURS • Fasting and meal tracking work offline; your log lives on your device • Community features (display name, avatar, cheers, leaderboards, group fasts) sync to our servers so other people can see them — you choose whether to take part, and you can remove your community profile at any time • Optional email sign-in to sync securely across devices • No ads, ever FastIQ Pro unlocks AI photo and label scanning, AI fasting insights, full calorie and macro tracking, and advanced analytics. Start with a free trial, then continue monthly or annually. COMMUNITY STANDARDS FastIQ has zero tolerance for objectionable content or abusive behaviour. Display names are filtered automatically, group fasts can only be hosted by people we have approved, and every profile, host and coach update can be reported or blocked from inside the app. Reports are reviewed within 24 hours and offending content and accounts are removed. Our Community Guidelines are in the app under Settings → Community, and at https://fastiq.fit/community-guidelines. FastIQ is an education and tracking tool, not medical advice. Talk to a qualified healthcare professional before starting any fasting or nutrition program, especially if you are pregnant, nursing, under 18, or managing a medical condition. Fasts longer than 48 hours carry real health risks and are not safe for everyone. Privacy Policy: https://fastiq.fit/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Fasting Center

Plan extended fasts with personalized projections. Input your body stats and desired duration to estimate weight change, fat loss, and energy use. This data-driven tool provides a clear starting point for your fasting journey.

Highlights
  • Personalized fast planning
  • Extended fast duration options
  • Projected weight change
  • Estimated fat loss
  • Energy use projection
  • Data-driven starting point
Features
Read full description

Fasting Center is a fasting timer and tracker for intermittent and extended fasting. Start a fast, watch the ring fill, see which stage your body is in, and keep your numbers in one place. Fast your way - Plans from 12:12 to 23:1 (OMAD), extended fasts of 24, 36, 48 and 72 hours, an open fast with no end, or a specific end time - A live ring that shows time elapsed, time left or percent. Tap the ring to switch - Change the start or end time whenever you need to - Milestone notifications and a reminder before your fast ends - A celebration when you finish, with your mood, a note and a picture of your fast to share Know what is happening - 17 fasting stages, from digestion to refeeding, and what each one means - Tips that make fasting easier - The scientific sources behind the stages and the calculators Log what matters - Weight, body fat, waist, ketones, blood glucose and blood pressure - Energy, hunger, motivation and anxiety on a scale of 1 to 10 - Calories, water, sodium, potassium and magnesium - Daily notes, and past fasts you add by hand - Apple Health - read weight, body fat, steps, heart rate and glucose, and write weight and body fat back See your patterns - A fasting calendar, charts of your fasting hours, recent fasts and streaks - Trends for your measurements and how you feel, and your BMI - Patterns found in your own data, such as when you feel hungriest Calculators - Extended fasting - estimate the weight you lose in a fast of 1 to 40 days, split into fat, protein, water and gut contents, with a refeeding guide - Intermittent fasting and calorie deficit - set a goal weight or daily calories and see a day-by-day projection Everywhere you look - Home screen widgets, a Live Activity on the Lock Screen and in the Dynamic Island, and an Apple Watch app with complications - Dark mode, accent colors, and pounds, kilograms or stones - Sixteen languages: English, Spanish, German, French, Portuguese, Italian, Polish, Turkish, Ukrainian, Russian, Japanese, Korean, Arabic, Indonesian, Urdu and Bengali - Import fasts from Easy Fast or Zero, and export your data to Excel - Use it without an account, or sign in with email, Google or Apple to sync between your devices Important Fasting Center is for general wellness and education. It is not medical advice. Extended fasting is not right for everyone, especially if you are pregnant, breastfeeding, under 18, underweight, or have a medical condition such as diabetes or a history of eating disorders. Talk to your doctor before you start. Weight and body composition projections are estimates, not predictions.

Screenshots

FastIQ4 screens
Fasting Center4 screens

Verdict

The call

The clearest difference is in-app purchases: Fasting Center at none against FastIQ's 2. Fasting Center also leads on update cadence (every 3 days vs fortnightly). On price, rating, review sentiment and ratings volume 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. FastIQ sells 2 in-app purchases, starting at $9.99 per month. Fasting Center asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for FastIQ against 4.8 for Fasting Center. Both are backed by a comparable volume of ratings — 37 and 26 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

FastIQ ships an update fortnightly, Fasting Center every 3 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
FastIQ versus Fasting Center: the parameters behind the verdict, then further details
ParameterFastIQFasting Center
PriceFreeFree
Rating4.9 (37 ratings) — better4.8 (26 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings37 — better26
Update frequencyFortnightlyEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.115.0 — better
Further details — not scored
Size91 MB50 MB
Age rating17+12+
DeveloperDaniel NeacsuAndrey Titov

Customer experience

FastIQ

All ratings37 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews24 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Fasting Center

All ratings26 ratings
Positive92.3%
Neutral3.8%
Negative3.8%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

FastIQ

Subscriptions2
  • FastIQ Pro (Monthly)3 Days trial$9.991 Month
  • FastIQ Pro (Annual)3 Days trial$49.991 Year
None

Fasting Center

No in-app purchases

Questions

Is FastIQ free?
FastIQ is free to download, with in-app purchases available.
Is Fasting Center free?
Fasting Center is free to download, with no in-app purchases.
Which has better reviews, FastIQ or Fasting Center?
FastIQ is rated higher. FastIQ averages 4.9 out of 5 from 37 ratings, while Fasting Center averages 4.8 from 26 ratings.
Do FastIQ or Fasting Center have ads?
Neither FastIQ nor Fasting Center shows ads.
Which is updated more often, FastIQ or Fasting Center?
FastIQ ships an update fortnightly, and Fasting Center every 3 days. Most recently, FastIQ was updated on October 28, 2026 and Fasting Center on October 31, 2026.

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