Comparison

Fast.io vs Hard 75

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

Head to head
About

Fast.io

Features
Read full description

Fast.io is a beautifully simple intermittent fasting timer designed to help you stay consistent and focused on your fasting goals. Track your fast in real time, monitor hydration, and stay motivated with clear insights, widgets, and Live Activities. Perfect for popular fasting schedules like **16:8, 18:6, or OMAD**. #### TRACK YOUR FAST β€’ Start fasting sessions with presets like 16:8, 18:6, or create custom fasting intervals β€’ See elapsed time, remaining time, and fasting phases\ β€’ Follow your fasting progress in real time #### TRACK YOUR WEIGHT β€’ Sync weight with Apple Health β€’ Monitor weight changes during fasting β€’ Understand how fasting affects your body #### STAY CONSISTENT β€’ Local reminders for fasting milestones β€’ Daily hydration tracking β€’ Motivation through achievements and streaks #### SEE YOUR PROGRESS β€’ History with notes and mood tracking β€’ Weekly, monthly, and yearly statistics β€’ Understand and improve your fasting habits #### BUILT FOR APPLE DEVICES β€’ Live Activities and Dynamic Island β€’ Home Screen and Lock Screen widgets β€’ Apple Watch companion app #### PRO FEATURES β€’ One‑time purchase (no subscription) β€’ Advanced customization β€’ Extended fasting history Fast.io is designed to make intermittent fasting simple, beautiful, and effective.

About

Hard 75

Features
Read full description

Hard 75 - Fitness Challenge Tracker 75 Hard is not just a fitness challenge - it's a mental toughness program designed to build unbreakable discipline, consistency, and self-control. Hard 75 is the premium, distraction-free dashboard built to help you stay accountable every single day - so you never have to restart Day 1 because of a forgotten task again. Whether you're focused on fitness, productivity, or personal growth, Hard 75 keeps your entire challenge structured, visible, and impossible to ignore. Why Choose Hard 75? - Daily task tracking - Progress dashboard - Offline & private - Minimal, focused design - Weight and water tracking - Custom challenges Who's it for? - 75 day fitness challenge participants - Habit builders - Anyone pursuing mental toughness 75 Hard - 75 Hard Challenge - Habit Tracker - Fitness Challenge Get started with Hard 75 today!

Screenshots

Fast.io4 screens
Hard 754 screens

Verdict

The call

The clearest difference is update cadence: Fast.io at monthly against Hard 75's every 4 months. Hard 75's advantage is iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Fast.io sells 1 one-off in-app purchase and Hard 75 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Fast.io ships an update monthly, Hard 75 every 4 months. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

Scorecard2 real differences Β· 4 level
Fast.io versus Hard 75: the parameters behind the verdict, then further details
ParameterFast.ioHard 75
PriceFreeFree
Update frequencyMonthly β€” betterEvery 4 months
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS26.015.1 β€” better
Further details β€” not scored
Size23 MB54 MB
Age rating4+4+
DeveloperStefan SturmGlenn Francis

In-app purchases

1 purchases

Fast.io

One-time1
  • Fast.io Pro$6.99
1 purchases

Hard 75

One-time1
  • Pro$9.99

Questions

Is Fast.io free?
Fast.io is free to download, with in-app purchases available.
Is Hard 75 free?
Hard 75 is free to download, with in-app purchases available.
Do Fast.io or Hard 75 have ads?
Neither Fast.io nor Hard 75 shows ads.
Which is updated more often, Fast.io or Hard 75?
Fast.io ships an update monthly, and Hard 75 every 4 months. Most recently, Fast.io was updated on September 21, 2026 and Hard 75 on September 20, 2026.

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