Comparison

Zero Fast vs Ocras

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

Head to head
About

Zero Fast

Track your intermittent fasting journey with an AI-powered coach. Get personalized plans, real-time metabolic insights, and science-backed education to support your weight management and metabolic health goals. Log hydration, weight, and mood to optimize your fasting experience.

Highlights
  • AI Fasting Coach
  • Personalized weekly fasting plans
  • Multiple fasting profiles
  • Real-time metabolic tracking
  • Hydration logging
  • Weight and progress dashboard
  • Apple Health integration
Read full description

Your fast, explained as it happens. Zero Fast times your fast, shows you the moment your body switches to fat-burning and ketosis, and lets you race friends in group challenges. No calorie counting. No strict diets.

About

Ocras

Features
Read full description

You don’t need another fasting app begging for your attention and tracking your data. Ocras is a simple fasting app built around one question: am I eating right now, or fasting? Set your eating window once, add a widget to your Home Screen, Lock Screen, or Apple Watch, and that’s pretty much it. Ocras works out your current fasting state from your schedule and shows it at a glance. There’s no need to start or stop a fast manually. No notifications telling you when to eat. No account to create. You shouldn’t have to open the app several times a day just to keep a fasting timer accurate. If it’s 3pm on a Tuesday, Ocras should simply be able to tell you at a glance whether you’re inside your eating window, without you unlocking your phone. What Ocras does * Set a different eating window for each day of the week, or use the same schedule every day * Choose from common schedules like 16:8, 18:6, 20:4 and OMAD, or make your own * Add widgets to your Home Screen and Lock Screen * Add widgets and complications to your Apple Watch * Choose from different widget styles, including the original designs, retro-inspired widgets and vaporwave themes * Check your fasting status without opening the app * Works completely offline - no cloud needed What Ocras deliberately does not do: * There are no notifications. * There’s no social feed or sharing. * There’s no account to maintain. * There’s no internet connection required for the core app (only if you want to unlock the additional widgets). * Your schedule and fasting data stay on your device - Ocras does not track anything about you. The aim is to keep Ocras useful without turning fasting into another thing you need to manage. Still growing: I’m continuing to add new widget designs, including more customisation options, and support for longer multi-day fasts is planned too. For now, Ocras is intentionally small: set your schedule, put a widget somewhere useful, and get on with your day. Set once. Glance when you need it. Happy fasting!

Screenshots

Zero Fast4 screens
Ocras4 screens

Verdict

The call

The clearest difference is in-app purchases: Ocras at none against Zero Fast's 2. Ocras also leads on update cadence (every 4 days vs every 2 weeks) and iOS requirement (18.0 vs 26.0). On price, 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. Zero Fast sells 2 in-app purchases, starting at $6.99 per month. Ocras asks for nothing beyond the download.

UpkeepUpdate frequency

Zero Fast ships an update every 2 weeks, Ocras every 4 days. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.

Scorecard3 real differences · 7 level
Zero Fast versus Ocras: the parameters behind the verdict, then further details
ParameterZero FastOcras
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS26.018.0 — better
Further details — not scored
Size41 MB53 MB
Age rating12+4+
DeveloperAPPE LATTE LIMITEDCONOR LUDDY

In-app purchases

2 purchases

Zero Fast

Subscriptions2
  • Zero Fast Monthly$6.991 Month
  • Zero Fast Annually$49.991 Year
None

Ocras

No in-app purchases

Questions

Is Zero Fast free?
Zero Fast is free to download, with in-app purchases available.
Is Ocras free?
Ocras is free to download, with no in-app purchases.
Do Zero Fast or Ocras have ads?
Neither Zero Fast nor Ocras shows ads.
Which is updated more often, Zero Fast or Ocras?
Zero Fast ships an update every 2 weeks, and Ocras every 4 days. Most recently, Zero Fast was updated on October 20, 2026 and Ocras on October 10, 2026.

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