Comparison

Empty vs FastingCat

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

FastingCat

Master intermittent fasting with a focused timer and science-backed tracking. Monitor your progress with detailed insights, charts, and smart notifications to stay motivated and in control of your fasting journey. Your privacy is prioritized with on-device data storage and no ads.

Highlights
  • Customizable fasting presets
  • Science-backed fasting zone tracking
  • Detailed progress charts
  • Flexible scheduling with grace days
  • Smart notifications
  • Seamless weight logging
  • On-device data privacy
Features
Read full description

FastingCat is the fast, focused way to master intermittent fasting and watch the scale move. The app puts clear metrics and practical tools in your pocket so you can stay consistent, motivated and fully in control—for absolutely free. Why FastingCat? • Simple setup: pick a preset (16-8, 18-6, 20-4, 24-hour, alternate-day or create your own) and start the timer with one tap. • Science-backed tracking: see exactly when you move from Anabolic to Catabolic, Fat Burning, Ketosis, Deep Ketosis and Autophagy. • Deep insights at a glance: total fasting hours, completed fasts, streak length, best streak, grace days used, weight change and more. • Rich charts: overlay weight and fasting windows, follow your progress week over week and celebrate each downward trend. • Flexible scheduling: choose specific weekdays or let FastingCat ignore a set number of grace days so real life never breaks your streak. • Smart notifications: get reminded when your eating window closes, when a zone switches or when it is time to break your fast. • Seamless weight logging: import weight from the Health app or type manually; all data stays on device. • No account required, no ads, no cloud storage. Your privacy stays yours. Power users can: • Fine-tune presets with second-level precision • Track progress in both metric and imperial units How we keep you motivated • Streak tracking rewards consistency • Milestone badges for total hours and longest fast • Detailed fasting zone timeline so you can actually “see” ketosis flip on • Fast completion reports you can share anywhere Who is FastingCat for? • Beginners starting a weight-loss journey • Athletes cutting fat without losing muscle • Biohackers chasing autophagy benefits • Anyone who wants a distraction-free fasting timer with serious stats Disclaimer FastingCat is a lifestyle tracker, not medical advice. Intermittent fasting may not suit everyone. Consult a qualified healthcare professional before making any dietary or exercise changes. Privacy and Terms Your data never leaves your device unless you choose to export it. See the full policies: • Privacy Policy: https://sites.google.com/view/fastingcat-privacy-policy/home • Terms of Use: https://sites.google.com/view/fastingcat-terms-of-use/home

Screenshots

Empty4 screens
FastingCat4 screens

Verdict

The call

The clearest difference is ads: FastingCat at none against Empty's shown. FastingCat also leads on review sentiment (100% vs 70%) and update cadence (every 6 days vs every 6 months). Empty's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.0). On price, ratings volume, 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. Empty sells 1 one-off in-app purchase and FastingCat sells 10 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

FastingCat holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 95 and 55 respectively. Written reviews point the same way: 70% of Empty's written reviews are positive against 100% of FastingCat's.

UpkeepUpdate frequency

Empty ships an update every 6 months, FastingCat every 6 days. The most recent releases landed on September 8, 2026 and August 7, 2026 respectively.

Scorecard6 real differences · 4 level
Empty versus FastingCat: the parameters behind the verdict, then further details
ParameterEmptyFastingCat
PriceFreeFree
Rating4.5 (95 ratings)4.9 (55 ratings) — better
Positive reviews70.0% of reviews100.0% of reviews — better
Number of ratings95 — better55
Update frequencyEvery 6 monthsEvery 6 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better17.0
Further details — not scored
Size14 MB24 MB
Age rating4+4+
DeveloperThang NguyenProApps Solutions

Customer experience

Empty

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

FastingCat

All ratings52 ratings
Positive96.2%
Neutral1.9%
Negative1.9%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Empty

One-time1
  • Pro Upgrade$4.99
10 purchases

FastingCat

Subscriptions5
  • Monthly Donation (Cookie)$0.991 Month
  • Monthly Donation (Donut)$2.491 Month
  • Monthly Donation (Smoothie)$4.991 Month
Show 2 more
  • Monthly Donation (Salad)$7.991 Month
  • Monthly Donation (Protein)$9.991 Month
One-time5
  • One-time Donation (Coffee)$1.99
  • One-time Donation (Sandwich)$4.99
  • One-time Donation (Pizza)$9.99
Show 2 more
  • One-time Donation (Groceries)$24.99
  • One-time Donation (Books)$49.99

Questions

Is Empty free?
Empty is free to download, with in-app purchases available.
Is FastingCat free?
FastingCat is free to download, with in-app purchases available.
Which has better reviews, Empty or FastingCat?
FastingCat is rated higher. Empty averages 4.5 out of 5 from 95 ratings, while FastingCat averages 4.9 from 55 ratings.
Do Empty or FastingCat have ads?
Empty shows ads; FastingCat does not.
Which is updated more often, Empty or FastingCat?
Empty ships an update every 6 months, and FastingCat every 6 days. Most recently, Empty was updated on September 8, 2026 and FastingCat on August 7, 2026.

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