Comparison

Arc vs Three Things Gratitude

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

Head to head
About

Arc

Features
Read full description

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/

About

Three Things Gratitude

Features
Read full description

Gratitude Journal is the simplest way to practice a moment of gratitude every day. THREE THINGS, EVERY DAY No different question each day, no long forms. Every day you write the same 3 short things you're grateful for โ€” whatever they are, as brief as you like. NO STREAKS, NO PRESSURE There's deliberately no streak counter and nothing that makes you feel bad for skipping a day. This isn't a challenge โ€” it's a moment for you. YOUR HISTORY, ON A CALENDAR Revisit any past day from a monthly calendar โ€” a dot under every day you wrote something. Tap a day to read back what you noted. A SHAREABLE MONTHLY RECAP At the end of the month, a nice card gathers how many days you wrote and a few of your standout moments โ€” ready to share, or just to keep. It unlocks by watching a short, optional ad, never required to write or read your entries. DAILY REMINDER A gentle nudge at whatever time you choose, so writing becomes a small habit without you having to remember on your own. YOUR DATA STAYS ON YOUR DEVICE Everything you write is stored locally on your iPhone. No account required. AVAILABLE IN ENGLISH AND SPANISH The app automatically detects your device's language, and you can change it manually anytime from Settings. No gamification, no quizzes, no noise. Just three things, every day.

Screenshots

Arc4 screens
Three Things Gratitude4 screens

Verdict

The call

The clearest difference is in-app purchases: Three Things Gratitude at none against Arc's 1. Three Things Gratitude also leads on update cadence (every 4 days vs every 9 days). Arc's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Arc sells 1 one-off in-app purchase. Three Things Gratitude asks for nothing beyond the download.

UpkeepUpdate frequency

Arc ships an update every 9 days, Three Things Gratitude every 4 days. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

Scorecard3 real differences ยท 3 level
Arc versus Three Things Gratitude: the parameters behind the verdict, then further details
ParameterArcThree Things Gratitude
PriceFreeFree
Update frequencyEvery 9 daysEvery 4 days โ€” better
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, Apple Watch โ€” betteriPhone
Requires iOS17.017.0
Further details โ€” not scored
Size18 MB19 MB
Age rating4+4+
Developerๅฒš็ƒœ ๅดDAVID VILCHEZ SANCHEZ

In-app purchases

1 purchases

Arc

One-time1
  • Arc Pro$6.99
None

Three Things Gratitude

No in-app purchases

Questions

Is Arc free?
Arc is free to download, with in-app purchases available.
Is Three Things Gratitude free?
Three Things Gratitude is free to download, with no in-app purchases.
Do Arc or Three Things Gratitude have ads?
Three Things Gratitude shows ads; Arc does not.
Which is updated more often, Arc or Three Things Gratitude?
Arc ships an update every 9 days, and Three Things Gratitude every 4 days. Most recently, Arc was updated on October 7, 2026 and Three Things Gratitude on September 30, 2026.

Other comparisons