Comparison

Phase vs LeanFast

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

Head to head
About

Phase

This app helps you track intermittent fasting and monitor your nutrition. It features an AI food scanner, calorie and macro tracking, and visual progress indicators for your fasting stages. Easily log meals, set custom fasting schedules, and view your body's estimated responses.

Highlights
  • Intermittent fasting timer
  • AI food scanner
  • Calorie and macro tracking
  • Estimated fasting stages
  • Custom fasting schedules
  • Weight and water intake tracking
  • Apple Health integration
Features
Read full description

Start fasting. See what's happening during your fast. Scan your meals. Phase is an intermittent fasting tracker, fasting timer, calorie tracker, and AI food scanner built to make fasting simple. Instead of showing only a countdown, Phase helps you follow your fasting journey through estimated body stages while keeping your calories, macros, weight, and nutrition in one place. TRACK YOUR FASTING STAGES • Follow estimated stages as your fast progresses • See stages including Sugar Drop, Fat Burn, Ketosis, and Autophagy • Understand where you are in your fasting window • Track your fasting progress with a simple visual timer FAST YOUR WAY • Choose 16:8, 18:6, 14:10, 20:4, OMAD, or a custom schedule • Start and stop your fast in one tap • Explore different intermittent fasting protocols • Use Home Screen widgets for quick access • Build consistency with streak and calendar tracking SCAN FOOD WITH AI • Take a photo of your meal and let AI analyze it • Scan packaged foods by barcode • Search foods when you want to log manually • Get calories and macro information • Add meals directly to your food diary TRACK CALORIES & MACROS • Monitor daily calories • Track protein, carbs, fat, and fiber • Organize food by breakfast, lunch, dinner, and snacks • See your remaining daily calorie target at a glance TRACK YOUR PROGRESS • Log your weight and follow your goal • Track daily water intake • Connect Apple Health to view your steps • Keep your fasting and nutrition progress together Phase combines an intermittent fasting tracker, calorie tracker, macro tracker, and AI food scanner in one simple app. No complicated routines. Just fasting, nutrition, and progress tracking in one place. Your body is already doing the work. Phase helps you follow the journey. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

LeanFast

Features
Read full description

Plan, track and keep up your intermittent fasting, with water, weight and food in one place. LeanFast shapes a plan around your body and your week, shows Fasting or Eating at a glance, logs your fasts, water, meals and weigh-ins, and suggests recipes for your eating window. No ads, no trackers, AI that stays on your device, and safety built in. Free to start. WHY LEANFAST • No ads, ever. No trackers, and your data is never sold. • Private AI: with Apple Intelligence, Coach answers your questions on your device, with the sources behind each answer, and Lens reads labels and barcodes there too. Smart Lens is optional, runs in Europe and doesn't keep your photo. • Safety first: a short health check adapts your plan, and "I don't feel well" stops your fast and calls the local emergency number in 234 countries and territories. • Backed by science: every source is listed in Settings › Health sources. • Accessible: VoiceOver, Dynamic Type at every size and Reduce Motion. • Everywhere: iPhone, iPhone Duo, iPad and Apple Watch. ALWAYS OBVIOUS One big word tells you where you are: Fasting, Eating or Not fasting, on Today, your Lock Screen, widgets and Apple Watch. Tap Start fast in the evening reminder, or turn on Autopilot: every planned fast starts when your eating window closes and ends when the next one opens. PLANS AS UNIQUE AS YOU LeanFast recommends Spark (from 12:12), Flow (the classic 16:8) or Blaze (longer fasts) and eases you in over four weeks. Shape every day on a 24-hour dial: brunch on Sunday, a late dinner on Friday, rest days when you need them. A TIMER YOU CAN GLANCE AT Follow your body stage by stage, with a new explanation at each milestone, on your Lock Screen, in the Dynamic Island, widgets and Control Center. Siri can start your fast, and the Watch app keeps going when your iPhone is out of range. MOTIVATION THAT'S GOOD FOR YOU Weekly challenges and levels reward consistency, water and logging, never longer fasts. A sick day never breaks your streak, and friendly water reminders let you log a glass from the notification. LEANFAST PRISM • Lens: a Fast-Friendly grade, nutrition facts and healthier swaps for any meal, label or barcode. • Kitchen: 96 photographed recipes to break your fast, with cook mode, timers and a shopping list. • Coach: a weekly review, answers to your questions and a nudge when your plan should change. • Deep insights: weight trend, goal forecast, consistency calendar and time in each stage. • Ring themes, app icons, progress photos, Streak Shields and custom fasts. WORKS WITH APPLE HEALTH Fill in your profile from Apple Health, import weigh-ins from your smart scale and save the weight and water you log. You choose what's shared. PRICING Free to use, no account needed. Prism is available monthly or yearly (each with a 7-day free trial) or as a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage them in your Apple Account settings. LeanFast provides general wellness information and is not a medical device or a substitute for professional medical advice. Terms: https://lean-fast.com/terms Privacy: https://lean-fast.com/privacy

Screenshots

Phase4 screens
LeanFast4 screens

Verdict

The call

The clearest difference is ads: LeanFast at none against Phase's shown. LeanFast also leads on update cadence (every 4 days vs every 10 days) and device support (3 vs 1). Phase's advantage is iOS requirement (17 vs 26.1). On price and in-app purchases 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. Phase sells 4 in-app purchases, starting at $9.99 per month and LeanFast sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Phase ships an update every 10 days, LeanFast every 4 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Phase versus LeanFast: the parameters behind the verdict, then further details
ParameterPhaseLeanFast
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 10 daysEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17 — better26.1
Further details — not scored
Size24 MB47 MB
Age rating4+12+
DeveloperIvan HubarHajer Trabelsi

In-app purchases

4 purchases

Phase

Subscriptions4
  • Unlimited (Monthly)$9.991 Month
  • Unlimited (Yearly) Sale$14.991 Year
  • Unlimited (3 Months)$24.993 Months
Show 1 more
  • Unlimited (Yearly)7 Days trial$34.991 Year
3 purchases

LeanFast

Subscriptions2
  • Prism Monthly7 Days trial$3.991 Month
  • Prism Yearly7 Days trial$29.991 Year
One-time1
  • Prism Lifetime$49.99

Questions

Is Phase free?
Phase is free to download, with in-app purchases available.
Is LeanFast free?
LeanFast is free to download, with in-app purchases available.
Do Phase or LeanFast have ads?
Phase shows ads; LeanFast does not.
Which is updated more often, Phase or LeanFast?
Phase ships an update every 10 days, and LeanFast every 4 days. Most recently, Phase was updated on October 25, 2026 and LeanFast on October 31, 2026.

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