Fast.io vs Hard 75
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Fast.io
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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’ Oneβtime purchase (no subscription) β’ Advanced customization β’ Extended fasting history Fast.io is designed to make intermittent fasting simple, beautiful, and effective.
Hard 75
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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
Verdict
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
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.
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.
| Parameter | Fast.io | Hard 75 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly β better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Requires iOS | 26.0 | 15.1 β better |
| Further details β not scored | ||
| Size | 23 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Sturm | Glenn Francis |
In-app purchases
Fast.io
- Fast.io Pro$6.99
Hard 75
- Pro$9.99









