Chemtrix vs Idle.py
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Chemtrix
A puzzle game where you build molecules by bonding atoms. Progress through levels, discover atomic secrets, and explore molecular structures. Features a free fall mode for continuous molecule building.
- Build molecules by bonding atoms
- 24 challenging levels
- Free fall mode for continuous play
- Learn atomic bonding and molecular structures
- Features Lewis-dot notation
- Accurate energy calculations
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Chemtrix is a fun arcade style puzzle game where your goal is to build molecules to progress through the game. There are 24 levels to work your way through, and on your journey you will discover the deepest secrets of the universe - how atoms bond and the structures and properties of the molecules they form. You can also play in 'free fall' mode, where new atoms drop continuously into the game board and your goal is to keep building molecules until you out of space. This is a fun game informed by real chemistry, the molecular structures you create and the way the atoms bond to each other are true to life. And extra features like lewis-dot notation and accurate energy calculations will delight discerning chemists.
Idle.py
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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
Verdict
The clearest difference is iOS requirement: Chemtrix at 13.0 against Idle.py's 15.1. On price, update cadence, ads and in-app purchases 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. Chemtrix sells 1 one-off in-app purchase and Idle.py sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 7, 2026 and September 25, 2026 respectively.
| Parameter | Chemtrix | Idle.py |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (95 ratings) — better | — |
| Positive reviews | 52.1% of reviews | — |
| Number of ratings | 95 — better | — |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 23 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Sam Woolf | Byte Insights Limited |
Bugs and requests
Chemtrix
Reported bugs
11 issues- Cannot progress past level 8/9
- In-app purchase prompt missing
- Game crashes
- Levels do not unlock after purchase
- Atom spawner glitches
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- Antimatter interaction issues
- Game not scaling for larger screens
- Level 16 impossible
- Game freezes or lags
- Molecule bonding issues
- Game not saving progress
Requested features
12 requests- Add more elements and compounds
- Include a sandbox mode
- Add a time limit option for levels
- Option to choose between naming structures or vice versa
- Translate to more languages (Spanish, Polish, Vietnamese, etc.)
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- Improve touch screen interface
- Add more levels
- Freeplay mode without antimatter
- Introduce 3D molecule representations
- Show formed molecules after game
- Adjustable speed settings
- Scale for bigger screens (iPhone)
Idle.py
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Chemtrix
- Unlock Chemtrix$0.99
Idle.py
- Mentor PackFree
- +5 Insight$0.99
- Skip 4 Hours$0.99
Show 5 moreShow fewer
- Skip 24 Hours$1.99
- +15 Insight$2.99
- Founder Pack$3.99
- Skip 7 Days$3.99
- Sandbox Mode$19.99









