Idle Space Mining vs Compost Kings
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Idle Space Mining
Dig through galaxies, merge miners to increase their strength, and build machines that mine while you're away. Discover new planets, upgrade your crew, and unlock powerful boosts to speed up your progress. Compete in timed events and earn rewards.
- Incremental mining gameplay
- Miner merging and upgrading
- Idle machine mining
- Galaxy exploration
- Dark Matter upgrades
- Event planets with leaderboards
- Cloud save functionality
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Idle Space Mining is an incremental clicker about digging your way across 12 galaxies. Drag your miners onto rocks and watch them dig. Merge two of a kind into a stronger miner. Dig out machines buried in the ground, build them, and they keep mining while you are away. Mine through the walls, reach the launch pad, and launch to the next planet. DIG WITH YOUR CREW Every rock holds gold ore, and now and then you find a rare Dark Matter rock. Pick which rocks your crew works and collect what they drop. Your crew comes with you to every new planet. MERGE YOUR MINERS Two miners of a level make one of the next. Higher levels dig faster. MINE THROUGH THE WALLS Each area ends in a wall. Dig a way to it, put your crew on it, and mine it down to open the next area. DIG OUT YOUR MACHINES Every planet starts with just the Ore Crusher. Fifteen more buildings lie buried across the galaxies, from the Power Plant and Drill Press to the Refinery, Smelter and Nuclear Plant. Reach one and buy more of it from the Upgrades menu. 96 PLANETS, 12 GALAXIES Eight planets in each galaxy, each with its own look, its own rock and its own walls. Launching earns Dark Matter, which you keep forever. FIVE DARK MATTER UPGRADES Spend Dark Matter on Ore Yield, Dig Speed, Miner Slots, Dark Affinity and Auto-Collect, ten levels each. They make every planet after it faster. RESEARCH AND COLONY BOOSTS Dig out the Power Core to open research, and grow the whole colony with Colony boosts. EVENT PLANETS Event planets open for three days at a time. Everyone starts with the same kit. Mine as many rocks as you can and see your rank on the Game Center leaderboard: your Top %, and where you stand among friends. Nothing is for sale on an event planet. THE LAST PLANET Mine through planet 96 and you have crossed all 12 galaxies. A finish screen marks it, and the event planets keep going after that. COMETS, DAILY GOALS, ACHIEVEMENTS Catch comets for a burst of ore. Clear daily goals. Claim achievements for a permanent bonus. EARNS WHILE YOU SLEEP Your machines keep mining when the app is closed. Come back to a pile. One optional ad, only if you want it: watch it for double production for four hours. No banners, no interstitials, nothing that interrupts play. No energy timers. Cloud save keeps your progress safe.
Compost Kings
Manage a cozy worm farm by feeding kitchen scraps and merging worms to discover new species. Fulfill neighbor requests and compete in weekly county fairs for rewards. The farm continues to grow even when you're offline.
- Merge worms to discover new species
- Fulfill neighbor orders
- Compete in weekly county fairs
- Idle gameplay with auto-feeders
- Collect various worm types and items
- Offline play
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Compost Kings is a cozy worm farm you can play in a minute or settle into for an hour. Drag kitchen scraps into your bins and let the worms do what worms do. Keep the greens and browns balanced and a bin turns Happy, doubling what it makes. Drag two worms of the same kind together and they merge into something fancier, from the humble Earthworm all the way up to the legendary Giant Gippsland. YOUR NEIGHBOURS ARE COUNTING ON YOU Grandpa Moss wants castings for his tomatoes. Chef Basil has more kitchen scraps than he knows what to do with. Ms. Petal's class would love to see a nightcrawler, and Juniper just wants to see something rare. Fill their orders and they'll become friends — five hearts each, with a gift at every one. THE COUNTY FAIR, EVERY WEEKEND Mayor Thistle runs three contests: enter your finest worm, race to harvest the most castings in five minutes, or keep a bin Happy longer than you ever have. Win yellow, red and blue ribbons, earn titles, and take all three blues for the prize rosette. Titles climb all the way to Compost King, Queen or Monarch — your choice. A FARM THAT KEEPS GOING Auto-Feeders keep your bins eating while you're away, and your worms carry on composting after you close the app. Hand-fed scraps are worth more, so tapping is a bonus, never a chore. THINGS TO COLLECT Five worm tiers to merge, eight wild species that wander into Happy bins (including the very rare Oregon Giant), four mutations, seasonal scraps that only appear in their months — pumpkins in October, pine needles in December — and ten hats for dressing up your worms. The Codex keeps track of all 37. THE GREAT MIGRATION When you've harvested enough, send your worms off to start a new farm and keep Golden Cocoons that make every future bin more productive. PLAYS AT YOUR PACE No account and no sign-in — open it and you're farming. Everything is drawn and every sound is generated inside the app, so it's small and it works offline. If motion bothers you, switch on Reduce Motion in iOS Settings and the farm holds still — the worms stop wandering and nothing pulses or blinks, without the game hiding anything from you. Made by one person and a lot of worms.
Screenshots
Verdict
The clearest difference is rating: Compost Kings at 5.0 against Idle Space Mining's 4.3. Compost Kings also leads on in-app purchases (none vs 6) and ads (none vs shown). On price, review sentiment, ratings volume and device support 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
Both are free to download. Idle Space Mining sells 6 one-off in-app purchases. Compost Kings asks for nothing beyond the download.
Compost Kings holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Idle Space Mining ships an update every 10 days, Compost Kings every 5 days. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.
| Parameter | Idle Space Mining | Compost Kings |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (4 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 | 4 |
| Update frequency | Every 10 days | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 160 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | ISAAC MICHAEL FRETT | Jacob Landa |
Customer experience
Idle Space Mining
Compost Kings
In-app purchases
Idle Space Mining
- Dark Matter Cache$1.99
- Temporal Shunt$2.99
- Deep Cryo Vault$3.99
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- Dark Matter Flask$4.99
- Overclock$4.99
- Dark Matter Reservoir$9.99
Compost Kings
No in-app purchases
Questions
Is Idle Space Mining free?
Is Compost Kings free?
Which has better reviews, Idle Space Mining or Compost Kings?
Do Idle Space Mining or Compost Kings have ads?
Which is updated more often, Idle Space Mining or Compost Kings?
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