Comparison

stac vs Hearth Island

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

Head to head
About

stac

Features
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Intro See your focus turn into visible progress. stac is a visual focus timer that helps you stay focused and watch your world grow over time. Simple Focus, No Friction Start instantly. No setup, no friction. - Clean and minimal design - Track study and work sessions - Distraction-free experience A flexible focus timer for study, work, and daily habits. (Pomodoro-style supported) Turn Time into Progress Every 10 minutes becomes progress. 10 minutes of focus = 1 Brick - Earn bricks and build your world - See your effort come to life Build Your World Your focus creates change. - Progress from early stages to advanced environments - Experience visible growth as you stay consistent - Feel your progress, not just track it Stay Consistent Build habits that last. - Track your streaks - Unlock achievements - Grow through leagues and levels Focus Together You are not alone. - Join global progress - Contribute alongside others - Stay motivated through shared effort Privacy First - No detailed study content shared - Minimal public data - Safe and pressure-free environment Built for Real Life Use it as a study timer, productivity timer, or habit tracker. Ideal for students, professionals, and anyone who prefers a simple, distraction-free focus experience. Get Started Focus better. Build your world. Stack your time with stac. Privacy Policy: https://aitomglobal.biz/api/users/legal/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Hearth Island

Features
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Start a focus session. When you finish, a tiny 3D island grows - and it keeps living while you're away. FOCUS. EARN. GROW A LIVING WORLD. Hearth Island turns the minutes you focus into something you can see. Set a timer, put the phone down, and do your work. Every focused minute earns one Spark. Spend them to plant trees, build cottages, adopt a companion, and raise whole new islands out of the sea. Nothing here is bought with money. Sparks are earned only by focusing - that is the whole point. A WORLD THAT LIVES ON ITS OWN - Real day and night, drifting clouds, and rain that ripples the sea - Four seasons that follow your real calendar - spring blossom, summer fireflies, autumn leaves that fall and gather, winter snow on every roof - Mochi, a companion who wanders the island, plays with a yarn ball, and naps in a little bed - Plants that grow a stage with every session you complete THE FOCUS THAT EARNS IT - Simple sessions - pick a length, start, and focus - Leave the app mid-session and it gently pauses instead of punishing you; a screen wake-lock keeps the phone awake while you work - Optional Focus Shield quiets notifications for the length of a session - Early ends still bank the minutes you focused - you are never punished for stopping GROW THE ISLAND - Plant flowers, bushes, pines, oaks and maples - Build cottages, cabins, a greenhouse, a lighthouse and a dock - Raise new land - Sunny Meadow, Quiet Cove, North Ridge - from open sea - The flagship moment: build the Bridge and a brand-new isle rises, "New area discovered!", with more ground to make your own FREE, AND ACTUALLY GENEROUS The whole loop - focus, earn, plant, build, grow - is free. You can fill a whole island without paying a cent. HEARTH PREMIUM Premium opens the full catalog - palms, campfires, wishing wells, cabins, greenhouses, lighthouses, companion pieces, and new islands as they arrive. Premium items still cost the Sparks you earn by focusing; money only opens the catalog, it never buys progress. $4.99/month, $29.99/year with a 7-day free trial, or $59.99 once for lifetime. Everything lives on your device. No account, no sign-up, and your island is never uploaded anywhere. Requires iOS 15 or later; the living 3D world needs a device with WebGL2 (iPhone 8 and later). ---------- Hearth Premium is available as a monthly ($4.99) or yearly ($29.99, with a 7-day free trial) auto-renewable subscription, or a one-time Lifetime purchase ($59.99). Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://starnova-io.github.io/hearth-island/terms.html Privacy Policy: https://starnova-io.github.io/hearth-island/privacy.html

Screenshots

stac4 screens
Hearth Island4 screens

Verdict

The call

The clearest difference is update cadence: Hearth Island at every 11 days against stac's every 2 months. On price, ads, in-app purchases and device support 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. stac sells 5 in-app purchases, starting at $2.99 per month and Hearth Island sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

stac ships an update every 2 months, Hearth Island every 11 days. Both last shipped on October 31, 2026.

Scorecard1 real difference ยท 5 level
stac versus Hearth Island: the parameters behind the verdict, then further details
ParameterstacHearth Island
PriceFreeFree
Update frequencyEvery 2 monthsEvery 11 days โ€” better
AdsYesYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details โ€” not scored
Size42 MB20 MB
Age rating4+4+
DeveloperAi To MobileNhan Vo

In-app purchases

5 purchases

stac

Subscriptions1
  • STAC Plus Membership$2.991 Month
One-time4
  • Streak Freeze$0.99
  • boost potion lite$0.99
  • boost potion pro$1.19
Show 1 more
  • Demotion Shield$1.99
3 purchases

Hearth Island

Subscriptions2
  • Hearth Premium Monthly$4.991 Month
  • Hearth Premium Yearly7 Days trial$29.991 Year
One-time1
  • Hearth Premium Lifetime$59.99

Questions

Is stac free?
stac is free to download, with in-app purchases available.
Is Hearth Island free?
Hearth Island is free to download, with in-app purchases available.
Do stac or Hearth Island have ads?
Both stac and Hearth Island show ads.
Which is updated more often, stac or Hearth Island?
stac ships an update every 2 months, and Hearth Island every 11 days. Most recently, stac was updated on October 31, 2026 and Hearth Island on October 31, 2026.

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