Comparison

Mettle vs Tiny Worlds

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

Head to head
About

Mettle

This app transforms your real-world steps into in-game attacks against monsters. Team up with friends to battle foes, level up your heroes, and conquer weekly challenges. Walk more to strengthen your squad and climb the leaderboards.

Highlights
  • Steps deal damage to monsters
  • Squad-based cooperative play
  • Weekly expeditions and world raids
  • Hero collection and evolution
  • Leaderboard rankings
  • Apple Health integration
Features
Read full description

Mettle is a free walking game where your steps are your weapon. Join a squad with your friends, take on monsters together, and level up as a team. Every real-world step you take deals damage, and every monster you defeat earns coins to recruit new heroes, like the mage, swordsman, archer and bard. Walk more, and your heroes level up and hit harder. How it works: - Pick your starting hero. When you walk in real life, your hero deals damage to monsters. - Join or create a squad and fight side by side with friends, wherever they are. - Take on a weekly expedition: a new monster every day and a boss every Sunday. - Go on hunts: forays and bounties with 47+ monsters, solo or with your squad. - Level up your squad to unlock emblems, banners, more members and tougher monsters. - Join the Weekly World Raid, where every player fights one giant boss together. - Add friends and challenge them to step duels. - Steps sync from Apple Health and hit the monster automatically, even while the app is closed. - Collect heroes across 24 lines, feed them XP from your walking, and evolve them into rarer forms. - Climb the leaderboard for today, this week, this month and all time. - No ads. Just you, your friends and a lot of walking! Note from the creator: Hey, I’m Daniel, and I built Mettle to motivate my family and friends to walk more and stay active. The first week of testing was a complete success. Everyone was hooked and genuinely making an effort to walk more to defeat the monsters together, level up their heroes, and climb the leaderboard. I designed and built Mettle entirely on my own. My goal now is to share it with any group that wants to stay active together. Happy walking!

About

Tiny Worlds

This app transforms your daily walks into a growing virtual world. Earn new stages by reaching step goals, and collect unique, finished worlds as keepsakes. It's a gentle, pressure-free way to encourage movement and build a personal collection.

Highlights
  • Walk-based world growth
  • Collect unique finished worlds
  • No streaks or guilt
  • Variety of world types
  • Integrates with Apple Health
  • Optional subscription for more content
Features
Read full description

Every step grows a world. Tiny Worlds turns your daily walk into a living, little diorama. Your steps are the only fuel — walk, and a tiny world grows, one stage at a time, until it becomes something you keep forever. No streaks. No guilt. Nothing withers if you miss a day. Your worlds wait patiently for you. HOW IT WORKS • Walk — your steps power the world you're growing. That's the whole engine. • Grow — reach your daily step goal and your world climbs to its next stage. Six stages, from a bare seed to a thriving little world. • Keep — finished worlds become keepsakes in your collection, each saved with the steps you walked and the days you tended it. A CALM COLLECTION Every world you plant rolls its own unique look, so no two you grow are ever quite the same. Fill a quiet little museum of the places your walking has made — grouped and waiting, never demanding. WORLDS TO GROW Start with everyday worlds — rainforest, grassland, savanna — then discover exotic ones like coral reefs, wetlands, and volcanic lands. POWERED BY YOUR STEPS Tiny Worlds reads your step count from Apple Health (iPhone and Apple Watch) to grow your worlds — that's all it needs. Your health data stays on your device. GENTLE BY DESIGN Optional, quiet reminders when a world is ready to grow — and nothing more. No badges to chase, no leaderboards, no pressure. A calm companion, not a taskmaster. WORLD KEEPER An optional subscription for when you want more to discover: unlock the exotic worlds and keep your whole collection safe and synced across your devices. Every step grows a world. Start with the one you'll take next. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Mettle4 screens
Tiny Worlds4 screens

Verdict

The call

The clearest difference is rating: Mettle at 4.6 against Tiny Worlds's 4.0. Mettle also leads on in-app purchases (none vs 2) and update cadence (every 2 days vs fortnightly). Tiny Worlds's advantage is review sentiment (100% vs 80%). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Tiny Worlds sells 2 in-app purchases, starting at $3.99 per month. Mettle asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Mettle holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Mettle has 37 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 80% of Mettle's written reviews are positive against 100% of Tiny Worlds's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Mettle ships an update every 2 days, Tiny Worlds fortnightly. The most recent releases landed on November 10, 2026 and November 1, 2026 respectively.

Scorecard6 real differences · 4 level
Mettle versus Tiny Worlds: the parameters behind the verdict, then further details
ParameterMettleTiny Worlds
PriceFreeFree
Rating4.6 (37 ratings) — better4.0 (2 ratings)
Positive reviews80.0% of reviews100.0% of reviews — better
Number of ratings37 — better2
Update frequencyEvery 2 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details — not scored
Size179 MB94 MB
Age rating4+4+
DeveloperDaniel ChungMariano Wadi Jacobo

Customer experience

Mettle

All ratings37 ratings
Positive89.2%
Neutral5.4%
Negative5.4%
Written reviews15 reviews
Positive80.0%
Neutral13.3%
Negative6.7%

Tiny Worlds

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Mettle

No in-app purchases

2 purchases

Tiny Worlds

Subscriptions2
  • World Keeper Monthly7 Days trial$3.991 Month
  • World Keeper Annual7 Days trial$29.991 Year

Questions

Is Mettle free?
Mettle is free to download, with no in-app purchases.
Is Tiny Worlds free?
Tiny Worlds is free to download, with in-app purchases available.
Which has better reviews, Mettle or Tiny Worlds?
Mettle is rated higher. Mettle averages 4.6 out of 5 from 37 ratings, while Tiny Worlds averages 4.0 from 2 ratings.
Do Mettle or Tiny Worlds have ads?
Neither Mettle nor Tiny Worlds shows ads.
Which is updated more often, Mettle or Tiny Worlds?
Mettle ships an update every 2 days, and Tiny Worlds fortnightly. Most recently, Mettle was updated on November 10, 2026 and Tiny Worlds on November 1, 2026.

Other comparisons