Comparison

Fast.io vs 75 Hard Challenge Day Tracker

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
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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€’ 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

75 Hard Challenge Day Tracker

Features
Read full description

Take on the 75 day challenge your way. Pick 75 Hard, 75 Soft, or build a Custom challenge with your own rules, then check off your tasks every day for 75 days. CHOOSE HOW STRICT YOUR CHALLENGE IS - 75 Hard: the canonical rules. Two workouts, water, reading, diet, progress photo. Miss a day and you restart from day 0. For purists. - 75 Soft: the gentler version with achievable daily tasks and grace days. - Custom: your tasks, your rules, your 75 days. GRACE DAYS - MISS A DAY WITHOUT LOSING EVERYTHING On Soft and Custom, a missed day does not wipe your progress. Instead, one day is added to the end of your challenge. You stay accountable without losing weeks of work to one bad day. (Hard keeps the classic day 0 restart.) EVERYTHING YOU NEED TO FINISH - Daily checklist for your preset's tasks: workouts, water, reading, diet, progress photo - Built-in water tracking - Progress photo timeline: watch 75 days of change side by side - Streak calendar with milestone celebrations along the way - Home Screen widget with today's tasks, so the challenge stays in front of you - Daily reminder at the time you choose WHY PEOPLE SWITCH TO THIS TRACKER Most 75 hard challenge apps force one rulebook and reset you to day 0 the moment you slip. This one lets you decide how strict to be, tracks your water without a second app, and turns your daily photos into a timeline you will actually want to look back on. Whether it is your first attempt or your fifth restart, day 1 starts today. 75 Hard Challenge Day Tracker is a subscription app. Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel anytime in Settings. Terms: https://www.benships.app/75challenge/terms Privacy: https://www.benships.app/75challenge/privacy

Screenshots

Fast.io4 screens
75 Hard Challenge Day Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: 75 Hard Challenge Day Tracker at none against Fast.io's 1. 75 Hard Challenge Day Tracker also leads on update cadence (weekly vs monthly) and iOS requirement (17.6 vs 26.0). On price, ads 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. 75 Hard Challenge Day Tracker asks for nothing beyond the download.

UpkeepUpdate frequency

Fast.io ships an update monthly, 75 Hard Challenge Day Tracker weekly. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

Scorecard3 real differences Β· 3 level
Fast.io versus 75 Hard Challenge Day Tracker: the parameters behind the verdict, then further details
ParameterFast.io75 Hard Challenge Day Tracker
PriceFreeFree
Update frequencyMonthlyWeekly β€” better
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, Apple Watch β€” betteriPhone
Requires iOS26.017.6 β€” better
Further details β€” not scored
Size23 MB67 MB
Age rating4+4+
DeveloperStefan SturmNgoc Truong

In-app purchases

1 purchases

Fast.io

One-time1
  • Fast.io Pro$6.99
None

75 Hard Challenge Day Tracker

No in-app purchases

Questions

Is Fast.io free?
Fast.io is free to download, with in-app purchases available.
Is 75 Hard Challenge Day Tracker free?
75 Hard Challenge Day Tracker is free to download, with no in-app purchases.
Do Fast.io or 75 Hard Challenge Day Tracker have ads?
Neither Fast.io nor 75 Hard Challenge Day Tracker shows ads.
Which is updated more often, Fast.io or 75 Hard Challenge Day Tracker?
Fast.io ships an update monthly, and 75 Hard Challenge Day Tracker weekly. Most recently, Fast.io was updated on September 21, 2026 and 75 Hard Challenge Day Tracker on September 20, 2026.

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