Comparison

Idle.py vs Gym Rats

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

Head to head
About

Idle.py

Features
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Idle.py โ€” a Python tutorial disguised as an idle game. Learn Python and modern AI engineering by playing. Tap to generate FLOPs (floating-point operations), then spend them on Compute Units that keep earning while you're away. Every Compute Unit you unlock โ€” from your first variable to an AGI Lab โ€” ships with a hand-written lesson, code samples, a quick-check quiz, and a 50-question practice bank. Real coding lessons. Real curriculum. No filler. THE COMPUTE UNIT LADDER โ€ข Variable, Function, Class, Module โ€” Python's atoms. โ€ข Tensor, Neuron, Layer โ€” what every model is built from. โ€ข Attention Head, Transformer Block โ€” the 2017 idea that ate AI. โ€ข Foundation Model, Agent โ€” pretraining, fine-tuning, tool-using LLMs. โ€ข GPU Cluster โ€” distributed training: DDP, tensor parallelism, pipeline parallelism, NCCL. โ€ข AGI Lab โ€” the recursive endgame. PYTHON PROGRAMMING BASICS (always free, always on) Lists & Tuples ยท Dicts & Sets ยท Strings & f-strings ยท Control Flow ยท Comprehensions ยท Iterators & Generators ยท Decorators ยท Exception Handling. PRACTICE BANKS Every lesson has 50 questions. Correct +1 knowledge, wrong โˆ’1 โ€” drift below a bucket and your bonus drops. Option order reshuffles every draw, so you learn the answer, not the position. THREE REWARD AXES โ€ข Mastery (+1% per level) โ€” earned from quizzes, capped at three per Compute Unit. โ€ข Knowledge (flat FLOPs/sec bonus) โ€” earned from practice banks. โ€ข Insight (compounding multiplier) โ€” earned from retraining the run. AI LANDMARKS 27 lifetime-FLOP milestones from "Hello, World" through GPT-4 and beyond. Each grants a permanent tap multiplier. The history of artificial intelligence is your scoreboard. TRANSCENDENCE (hardcore loop) Stack ten GPU Clusters and you can transcend: wipe the run for a permanent global multiplier and one Transcendence Unit (TU). Spend TU to unlock Singularity and ASI โ€” the loop above the loop. NO ADS. NO SUBSCRIPTIONS. Optional one-time purchases only: โ€ข Founder Pack โ€” permanent ร—2 multiplier on FLOPs and tap. โ€ข Mentor Pack โ€” advanced curriculum (LoRA, RLHF, Mixture of Experts, Evals). โ€ข Time skips and insight packs as small consumables. WHO IT'S FOR โ€ข Beginners who want a more rewarding Python tutorial than another video course. โ€ข Engineers picking up the modern AI engineering stack from the ground up. โ€ข Anyone who wants their idle game to teach them something real. Idle.py respects your time. Progress saves automatically. Offline FLOPs are credited on launch. No popup ads. No timers built to wear you down. Just the curriculum, the loop, and the math.

About

Gym Rats

Features
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You start with one dusty treadmill and a single member. Where it goes is up to you. Gym Rats is an idle tycoon about turning a tiny gym into a money making fitness empire. Buy equipment, hire staff, pack the floor with members, and watch the cash roll in. Then walk away. Your gym keeps earning while you are gone, so there is always money waiting when you come back. Every room you unlock changes things. Line up treadmills in cardio, load the racks in free weights, run classes in yoga, spar in the boxing ring, then cool off in the sauna and pool. Upgrade the gear and the members keep coming. What you do: - Earn idle cash around the clock, online or offline - Buy and upgrade real gym gear, from treadmills to squat racks - Hire trainers, receptionists and cleaners to keep things running - Fill the floor with members who actually work out - Run marketing campaigns to pull in bigger crowds - Prestige and restart stronger when you hit the ceiling - Chase goals and unlock new gear to build toward And it does not stop at one gym. Take your empire somewhere new. Build in the desert, on the ice, deep underwater, out in space, back in the age of giants and more. Each world reskins the whole place with its own gear, members and feel. No timers nagging you. No pressure. Just a gym that grows every time you check in. Start building. Free to play, with optional in-app purchases.

Screenshots

Idle.py4 screens
Gym Rats4 screens

Verdict

The call

The clearest difference is ads: Idle.py at none against Gym Rats's shown. On price, update cadence, 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. Idle.py sells 8 one-off in-app purchases and Gym Rats sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Idle.py ships an update weekly, Gym Rats every 2 weeks. The most recent releases landed on September 25, 2026 and September 27, 2026 respectively.

Scorecard1 real difference ยท 5 level
Idle.py versus Gym Rats: the parameters behind the verdict, then further details
ParameterIdle.pyGym Rats
PriceFreeFree
Update frequencyWeekly โ€” betterEvery 2 weeks
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 โ€” better
Further details โ€” not scored
Size39 MB24 MB
Age rating4+4+
DeveloperByte Insights LimitedAlessio A. K Aboagye

In-app purchases

8 purchases

Idle.py

One-time8
  • Mentor PackFree
  • +5 Insight$0.99
  • Skip 4 Hours$0.99
Show 5 more
  • Skip 24 Hours$1.99
  • +15 Insight$2.99
  • Founder Pack$3.99
  • Skip 7 Days$3.99
  • Sandbox Mode$19.99
5 purchases

Gym Rats

One-time5
  • 4 Hour Time SKip$0.99
  • Remove Ads$2.99
  • Starter Pack$4.99
Show 2 more
  • Beast Tokens (Small)$4.99
  • Beast Tokens (Large)$19.99

Questions

Is Idle.py free?
Idle.py is free to download, with in-app purchases available.
Is Gym Rats free?
Gym Rats is free to download, with in-app purchases available.
Do Idle.py or Gym Rats have ads?
Gym Rats shows ads; Idle.py does not.
Which is updated more often, Idle.py or Gym Rats?
Idle.py ships an update weekly, and Gym Rats every 2 weeks. Most recently, Idle.py was updated on September 25, 2026 and Gym Rats on September 27, 2026.

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