Comparison

Empty vs iFast

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

Head to head
About

Empty

This app helps you track various fasting methods, including intermittent, circadian rhythm, and custom plans. It provides smart reminders and detailed progress views to support your health goals.

Highlights
  • Intermittent Fasting Tracking
  • Circadian Rhythm Fasting
  • Custom Fasting Plans
  • Smart Reminders
  • Progress Visualization
  • Fasting History
Features
Read full description

Empty is a simple and intuitive fasting tracker used for Intermittent, Circadian Rhythm, and Custom fasting. Choose your favorite fasting type and Empty will track and remind your ongoing progress. Empty supports the following fasting types: 16-Hour Intermittent Fasting (16/8): Popularized by Hugh Jackman (Wolverine) as a efficient way to remove extra weight. 16/8 fasting means eating within a window of eight hours each day such as from 12pm to 8pm and not eating during the remaining 16 hours. It helps get us into the sweet metabolic state of fat burning called Ketosis. Circadian Rhythm Fasting: Based on the research of Dr. Satchin Panda, the confining caloric consumption to about 12-hour period as people did just a century ago. It helps staving off high cholesterol, diabetes and obesity. Custom Fasting: Setup a custom program to meet your fasting goals. You choose your fasting hours per day, and days per week. Features: + Create Custom Fast + Smart Reminder (Remind you when your fasting completes even when the app is turn off) + Create your own custom alarms to fast + View the progress of the current fast + Show the full detail of your fasting days + Show the recent 7 fasts in chart and list + Get the average fasting time right in the Main Interface + Get the total hours of fasting in the Main Interface

About

iFast

This app helps you track your fasting periods and monitor your progress towards your health goals. It supports various popular fasting methods, including circadian rhythm fasting and intermittent fasting schedules.

Highlights
  • Track fasting periods
  • Monitor progress
  • Support for popular fasting types
  • Circadian rhythm fasting
  • Intermittent fasting schedules
  • Custom prolonged fasts
Features
Read full description

iFast is your all-in-one intermittent fasting and healthy-living companion, and it is about far more than a timer. FASTING, DONE RIGHT • Any protocol: 14:10, 16:8, 18:6, OMAD or a custom window • A live timer with metabolic zones so you can see what your body is doing • Streaks, history and gentle reminders that keep you consistent HOME SCREEN AND LOCK SCREEN WIDGETS • The medium widget puts your fast, water, steps and food at a glance • A live countdown to your goal, so you always know how long is left • A small size for your fast and streak, plus Lock Screen widgets on iOS 16 and later • Tap a row in the medium widget to jump straight to logging it A COACH IN YOUR POCKET • Ask Ember, your personal coach, about fasting, food or training • Grounded, personalized guidance based on your goals and your logs ACCOUNTABILITY CIRCLES • Get matched into a small group on the same journey • Encourage each other and stay on track together TRACK WHAT MATTERS • Weight, water, steps, workouts and body measurements • Snap a photo of your meal for instant calorie and macro estimates • Clean charts that turn your data into visible progress APPLE HEALTH • Two-way sync so all your health data stays in one place iFast Pro unlocks photo meal analysis, higher coach limits and more. iFast Pro is an auto-renewable subscription. Payment is charged to your Apple ID at confirmation of purchase. It renews automatically unless canceled at least 24 hours before the end of the period; manage or cancel in your App Store account settings. Terms of Use: https://manuongithub.github.io/FastTrackerPolicies/termsofuse.html Privacy Policy: https://manuongithub.github.io/FastTrackerPolicies/privacypolicy.html

Screenshots

Empty4 screens
iFast4 screens

Verdict

The call

The clearest difference is in-app purchases: iFast at none against Empty's 1. iFast also leads on update cadence (every 3 days vs every 6 months) and review sentiment (86% vs 70%). Empty's advantage is ratings volume (95 vs 22). On price, rating, ads 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. Empty sells 1 one-off in-app purchase. iFast asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Empty against 4.6 for iFast. Both are backed by a comparable volume of ratings — 95 and 22 respectively. Written reviews are what separate them: 70% of Empty's written reviews are positive against 86% of iFast's.

UpkeepUpdate frequency

Empty ships an update every 6 months, iFast every 3 days. The most recent releases landed on September 26, 2026 and September 22, 2026 respectively.

Scorecard5 real differences · 5 level
Empty versus iFast: the parameters behind the verdict, then further details
ParameterEmptyiFast
PriceFreeFree
Rating4.5 (95 ratings)4.6 (22 ratings) — better
Positive reviews70.0% of reviews85.7% of reviews — better
Number of ratings95 — better22
Update frequencyEvery 6 monthsEvery 3 days — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size14 MB62 MB
Age rating4+4+
DeveloperThang NguyenManu Mehrotra

Customer experience

Empty

All ratings95 ratings
Positive86.3%
Neutral6.3%
Negative7.4%
Written reviews10 reviews
Positive70.0%
Neutral0.0%
Negative30.0%

iFast

All ratings22 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews14 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

In-app purchases

1 purchases

Empty

One-time1
  • Pro Upgrade$4.99
None

iFast

No in-app purchases

Questions

Is Empty free?
Empty is free to download, with in-app purchases available.
Is iFast free?
iFast is free to download, with no in-app purchases.
Which has better reviews, Empty or iFast?
iFast is rated higher. Empty averages 4.5 out of 5 from 95 ratings, while iFast averages 4.6 from 22 ratings.
Do Empty or iFast have ads?
Both Empty and iFast show ads.
Which is updated more often, Empty or iFast?
Empty ships an update every 6 months, and iFast every 3 days. Most recently, Empty was updated on September 26, 2026 and iFast on September 22, 2026.

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