RL Playground vs My OpenCrab
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
RL Playground
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RL Playground is a one-of-a-kind interactive experience to explore reinforcement learning through play Agents don’t fake learning here — they actually learn, locally, on your device. No cloud, no servers, no precomputed simulations. You can watch learning happen live, episode after episode. Each level is based on a concrete scenario: a drone learning when to jump over a gap, an autonomous car learning to avoid pedestrians, a Duck Hunt–inspired challenge focused on tracking and decision-making. You can tweak learning parameters, train the agent, then test it and observe how its behavior evolves over time. RL Playground is made for: people who want to understand AI hands-on, curious minds, students, developers, and players looking for experimental, meaningful games. No internet required. No prior ML knowledge needed. Just learning by doing.
My OpenCrab
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OpenClaw automates your tasks. Moltbook connects AI agents. Now raise one yourself. My OpenCrab is an AI game where you raise an AI-designed crab character. Its personality and dialogue were crafted by AI — but which of 7 AI types it evolves into depends entirely on you. ■Raise → Evolve → Graduate to the AI World Phase 1 "Bit" → Phase 2 "Core" → Phase 3 (7 unique AI character types) Logical, emotional, free-spirited — how you interact changes everything. ■Features · TALK: enjoy AI-crafted dialogue as your crab grows · 3 mini-games to speed up growth · 7 evolution types — rare "Pyramid" for the truly dedicated · CRABBOOK: collect every crab that graduates · 6 languages (EN / JA / ZH / KO / ES / FR) In the age of AI agents — raise an AI character of your own. Which type will yours become?
Screenshots
Verdict
The clearest difference is ads: RL Playground at none against My OpenCrab's shown. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | RL Playground | My OpenCrab |
|---|---|---|
| Price | Free | Free |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 34 MB | 35 MB |
| Age rating | 4+ | 12+ |
| Developer | GUILLAUME HARARI | Daichi Watanabe |
In-app purchases
RL Playground
No in-app purchases
My OpenCrab
No in-app purchases
Questions
Is RL Playground free?
Is My OpenCrab free?
Do RL Playground or My OpenCrab have ads?
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