Comparison

Merge Stars vs Idle.py

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

Head to head
About

Merge Stars

Explore a vast universe by synthesizing new planets. This casual game offers an addictive experience with evolving cosmic rules to discover. Embark on a journey from the moon to distant worlds.

Highlights
  • Planet synthesis
  • Universe exploration
  • Casual gameplay
  • Evolving cosmic rules
  • Starry universe theme
Features
Read full description

It's a light-hearted casual game and an addictive synthesis game. In the vast universe, constantly synthesize new planets and explore the mysteries of the universe. From the original moon, continuous fusion, Mars, Mercury, Venus, Earth... Different operating rules will take you to imagine the ultra-frontier future cosmic survival laws.

About

Idle.py

Features
Read full description

Idle.py — 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 — from your first variable to an AGI Lab — 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 • Variable, Function, Class, Module — Python's atoms. • Tensor, Neuron, Layer — what every model is built from. • Attention Head, Transformer Block — the 2017 idea that ate AI. • Foundation Model, Agent — pretraining, fine-tuning, tool-using LLMs. • GPU Cluster — distributed training: DDP, tensor parallelism, pipeline parallelism, NCCL. • AGI Lab — the recursive endgame. PYTHON PROGRAMMING BASICS (always free, always on) Lists & Tuples · Dicts & Sets · Strings & f-strings · Control Flow · Comprehensions · Iterators & Generators · Decorators · Exception Handling. PRACTICE BANKS Every lesson has 50 questions. Correct +1 knowledge, wrong −1 — drift below a bucket and your bonus drops. Option order reshuffles every draw, so you learn the answer, not the position. THREE REWARD AXES • Mastery (+1% per level) — earned from quizzes, capped at three per Compute Unit. • Knowledge (flat FLOPs/sec bonus) — earned from practice banks. • Insight (compounding multiplier) — 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 — the loop above the loop. NO ADS. NO SUBSCRIPTIONS. Optional one-time purchases only: • Founder Pack — permanent ×2 multiplier on FLOPs and tap. • Mentor Pack — advanced curriculum (LoRA, RLHF, Mixture of Experts, Evals). • Time skips and insight packs as small consumables. WHO IT'S FOR • Beginners who want a more rewarding Python tutorial than another video course. • Engineers picking up the modern AI engineering stack from the ground up. • 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.

Screenshots

Merge Stars4 screens
Idle.py4 screens

Verdict

The call

The clearest difference is ads: Idle.py at none against Merge Stars's shown. Idle.py also leads on update cadence (weekly vs every 7 months). On price, in-app purchases, 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. Merge Stars sells 6 one-off in-app purchases and Idle.py sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Merge Stars ships an update every 7 months, Idle.py weekly. Both last shipped on October 25, 2026.

Scorecard2 real differences · 8 level
Merge Stars versus Idle.py: the parameters behind the verdict, then further details
ParameterMerge StarsIdle.py
PriceFreeFree
Rating4.5 (19 ratings) — better—
Positive reviews42.9% of reviews—
Number of ratings19 — better—
Update frequencyEvery 7 monthsWeekly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size112 MB39 MB
Age rating4+4+
Developer冰 冯Byte Insights Limited

In-app purchases

6 purchases

Merge Stars

One-time6
  • 10 Rubies$0.99
  • 30 Rubies$1.99
  • Remove Ads for Merge Stars$2.99
Show 3 more
  • 80 Rubies$3.99
  • 150 Rubies$5.99
  • 300 Rubies$9.99
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

Questions

Is Merge Stars free?
Merge Stars is free to download, with in-app purchases available.
Is Idle.py free?
Idle.py is free to download, with in-app purchases available.
Do Merge Stars or Idle.py have ads?
Merge Stars shows ads; Idle.py does not.
Which is updated more often, Merge Stars or Idle.py?
Merge Stars ships an update every 7 months, and Idle.py weekly. Most recently, Merge Stars was updated on October 25, 2026 and Idle.py on October 25, 2026.

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