Arc vs 75 Day Challenge
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Arc
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Most challenge apps ask you to pay before you've finished week one. Arc doesn't. The 30 Day Reset isn't a trial version. It's the whole thing, all thirty days, free, and it stays free. Pick a challenge, tick your tasks, watch a row of empty boxes fill in one a day. That's the app. No feed, no friends list, no leaderboard, and nothing in here calls you champ. FIVE WAYS TO START 30 Day Reset. Three habits you choose yourself. Free. 66 Day Habit Builder. Three to five habits, and sixty-six days because that's the number the research keeps landing on. 75 Day Classic. Two workouts, a diet, water, reading, a daily photo. 75 Day Gentle. Same seventy-five days with one workout and a bit of air. Custom. Your rules, 21 to 90 days. APPLE HEALTH DOES THE BORING PART Switch on auto-tracking for a task and Arc reads your steps, exercise minutes, outdoor workouts, water and mindful minutes, then ticks it off without being asked. It only ever reads. Nothing gets written back to Health, and none of it leaves your phone. Don't want to grant that? Those tasks stay manual and the rest of the app doesn't care. SEASONS Shared start dates run through the year: Fall Lock-In, Winter Arc, New Year Arc, Spring Reset, Summer Arc. Begin on one and its stamp goes on your finisher card. Starting tomorrow instead is also a perfectly good plan. STRICT MODE, OFF BY DEFAULT Turn it on and a missed day sends you back to Day 1. You get one grace day for the whole run, and once it's gone it's gone. The card at the end looks the same either way. THE FINISHER CARD Reach the end and Arc prints you a card: day count, completion rate, longest streak, and the sentence you wrote on day one about why you started. Square, story, or wide. Save it to Photos or send it straight out. Widgets put the day count and what's left on your home screen and lock screen. The medium one lets you tick things off without opening the app. WHAT ARC WON'T DO No account, so there is no email and no password to lose. Your data sits on your phone and in your own iCloud, and I can't see any of it. No ads. Progress photos stay in Arc on your phone. Nobody checks them, nobody looks at them. FREE, PERMANENTLY The 30 Day Reset in full. One custom challenge. The small widget. Your finished history. Apple Health auto-tracking. ARC PRO Every template, unlimited custom challenges, several running at once, all the widget sizes including the interactive one, and the finisher card in all three shapes. Pay by the month or the year, or buy it once and it's yours. Arc syncs through your own iCloud, so a new phone picks up where the old one stopped. Turn iCloud off and everything still works on the device. Privacy: https://arc.wuyuxai.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
75 Day Challenge
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A 75-day habit challenge you can actually finish. Pick Strict, Soft, Medium, or Custom. Check off the day. Take a private photo. Lock it in. WHAT YOU GET ⢠Daily checklist for workouts, water, reading, diet, and a progress photo ⢠Strict, Soft, Medium, or your own rules ⢠A 75-day grid that shows locked, missed, and days still ahead ⢠Private photos on this iPhone. Compare any two days. ⢠A Day Card you can share when you lock the day ⢠Widgets for the Home Screen and Lock Screen ⢠Reminders you control HOW IT WORKS 1. Choose a preset and a start date 2. Do the work 3. Lock the day before midnight On Strict, a missed day restarts the attempt. Soft and Medium keep going. History and photos stay. Unlock with a 3-day free trial, then a weekly plan, or pay once for lifetime. Not affiliated with any third-party challenge brand. Privacy Policy: https://tedstudios.online/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
Arc and 75 Day Challenge are too close to call on the numbers: across 5 compared parameters ā price, ads, in-app purchases and device support among them ā neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Arc sells 1 one-off in-app purchase and 75 Day Challenge sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | Arc | 75 Day Challenge |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days | ā |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, Apple Watch ā better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details ā not scored | ||
| Size | 18 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | å²ē å“ | Nuno Lopes |
In-app purchases
Arc
- Arc Pro$6.99
75 Day Challenge
- Weekly Unlock3 Days trial$3.997 Days
- Lifetime Unlock$15.99









