Rot & Ferment vs AI Training Simulator
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
Rot & Ferment
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Most idle games make you wait because waiting is the monetization lever. Rot & Ferment makes you wait because that's what fermentation actually is. You run a small cellar: a few crocks, jars, and barrels, and a rotating cast of things worth aging - sourdough, kimchi, sauerkraut, yoghurt, kefir, tomme, cider, wine. Start a batch, and it needs real time. Minutes for a quick ferment, hours overnight, a full day for something worth the wait. THE DECISION ISN'T "WHEN IS IT DONE" - IT'S "WHAT DESERVES THIS VESSEL RIGHT NOW" Every batch rises in value, peaks, then slowly drifts past its best. Pull it early for safe, modest money. Hold it to the peak for the real payoff. Forget about it, and it doesn't spoil to nothing - it just costs you the upside. Nothing in this cellar punishes you for living your life. Each recipe leans one of two ways: โข Safe - a wide, forgiving window. Never loses money, whenever you get back to it. โข Greedy - a narrow peak and a steep drop-off. Higher reward, if you're actually on time. That choice repeats across six absence lengths, from "checking my phone right now" to "see you in the morning" - so there's always a right answer for how long you're actually going to be gone. BUILD THE CELLAR THAT LETS YOU AGE MORE Early recipes are ready in minutes. The long, valuable ferments - the tomme, the wine - are locked behind upgrades: more crocks, a cold cellar, humidity control. Every upgrade widens a window or slows a decay, so the game never turns into "wait less, click more." It turns into "cellar space is scarce, spend it well." Offline the whole time? Your batches keep aging without you. Come back to a full report of what happened while you were away. No forced ads, no pay-to-skip pressure. If a boost ever helps, it's your call, not the game's. Rot & Ferment is made by a very small team, in the evenings after our day jobs, because we love building it. We keep improving it: the details, the art, the feel of every screen. We'd love to hear what you think: the pacing, the balance, the atmosphere, what you enjoy and what could be better. Write to us at rotandferment.com/support, or leave a review. Thank you for playing, and for helping shape where it goes.
AI Training Simulator
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One laptop. That's how every AI empire starts. Tap to train your first model, cash in your credits, and buy a second machine. Then a Gaming PC. Then a GPU Server. Before long you're not tapping at all โ you're running a Global AI Data Center that prints compute while you sleep. BUILD THE FULL STACK Unlock 13 tiers of hardware, each one dwarfing the last: Laptop - Gaming PC - AI Workstation - GPU Server - Server Rack - Mini Data Center - AI Compute Cluster - AI Supercomputer - Quantum AI Server - Global AI Data Center - AI Factory - AGI Research Lab - AI Civilization Network TAP FIRST, AUTOMATE LATER Every run starts hands-on and ends fully automated. Buy your way out of tapping, then watch the numbers climb on their own. PRESTIGE FOR PERMANENT POWER Hit the wall? Reset your empire and convert everything you built into Citation Points โ permanent multipliers that carry into every future run. Each restart is faster, richer, and reaches further than the last. TEN RESEARCH UPGRADES Spend Citation Points in the research tree and reshape how you play. Neural Efficiency, Overclock Reserves, Autonomous Training, Streak Insurance, Lucky Circuits and more โ each with multiple levels and a real impact on your build. STACK YOUR MULTIPLIERS Income boosters from x2 all the way to x8. Instant Power surges that bank hours of income in one tap. Layer them and watch your credits per second go vertical. EARN WHILE YOU'RE AWAY Your data centers don't clock out. Come back to a pile of offline credits waiting to be collected โ and claim an offline bonus on top. SPIN, CLAIM, REPEAT - Lucky Spin wheel with common, mega and legendary tiers - A 28-day daily reward calendar that keeps getting better - Around 90 achievements to chase across every system in the game - Level up as you play and unlock rewards along the way CLEAN, HONEST PROGRESSION No paywalls blocking the good part. Ads are optional and only ever reward you โ never interrupt you. One purchase removes them forever if you'd rather skip them entirely.
Screenshots
Verdict
The clearest difference is update cadence: AI Training Simulator at every 2 days against Rot & Ferment's every 4 days. 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
Both are free to download. Rot & Ferment sells 5 one-off in-app purchases and AI Training Simulator sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Rot & Ferment ships an update every 4 days, AI Training Simulator every 2 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.
| Parameter | Rot & Ferment | AI Training Simulator |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days | Every 2 days โ better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPad, iPod โ better |
| Requires iOS | 15.0 | 15.0 |
| Further details โ not scored | ||
| Size | 457 MB | 69 MB |
| Age rating | 12+ | 4+ |
| Developer | Nils Rohwer | Yi Hong Lim |
In-app purchases
Rot & Ferment
- Time skip$0.99
- Hire a trusted carter$0.99
- Buy a crock$1.99
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- Remove ads$2.99
- Permanent x2 income$4.99
AI Training Simulator
- Small Gems Pack$0.99
- Remove Ads$3.99
- Small Package$3.99
Show 6 moreShow fewer
- Medium Gems Pack$4.99
- Starter Package$6.99
- Medium Package$9.99
- Large Gems Pack$9.99
- Large Package$19.99
- Colossal Gems Pack$19.99
Questions
Is Rot & Ferment free?
Is AI Training Simulator free?
Do Rot & Ferment or AI Training Simulator have ads?
Which is updated more often, Rot & Ferment or AI Training Simulator?
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