RGB_Light vs 23Brain
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RGB_Light
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影の色をデザインする新しいコンセプトの照明、RGB_Light。 3灯の光を加法混色することで、白い光の中に彩る影をつくり出します。 RGB_LightとアプリをBluetooth接続することで、光と影の色をコントロールすることが可能に。 プリセットモードを選択して手軽に影の色を変更したり、お気に入りのモードを作成することも。 ウォームホワイトに切り替えて普通照明として使用することもできます。 本体固有のパスワードを使用して10m範囲にある複数のライトを同時に管理することや、個別管理が可能。 また、色相回転モードにより、影の色が次第に変化していく「RGB_Light」だけの特別な演出効果も搭載。 アナログな光の原理は、エモーショナルな空間を演出します。 店舗やご家庭・イベントスペース・学校・スタジオなど様々なシーンで特別な体験を。
23Brain
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Your second and third brain for smarter learning 23Brain helps you collect, summarize, and retain knowledge from everything you read, watch, or listen to — powered by AI. Build a personal learning system that grows with you. How it works • Summarize any content automatically Save links, videos, or PDFs — 23Brain generates concise, AI-powered summaries. • Learn on the go Listen to audio summaries anywhere and make use of your time more efficiently. • Organize with collaborative collections Group related topics, share insights, or explore curated watchlists. • Retain knowledge with AI-generated quizzes Reinforce what you’ve learned through personalized quizzes that adapt to your interests. • Chat with your second brain Ask questions, connect ideas, and reflect on what you’ve learned through intelligent conversations. • Track your progress Stay motivated with streaks, insights, and detailed learning statistics. Why 23Brain Unlike traditional note-taking tools, 23Brain helps you remember more and understand faster — not just store information. It’s your personal AI companion for continuous learning and long-term growth. Key features • AI summaries for articles, videos, and podcasts • Audio playback for summaries • Personalized quizzes and progress insights • Collaborative collections and watchlists • Multi-language support for 12 languages including English, German, and Hindi • Light and Dark Mode Start building your second brain today. Turn what you learn into knowledge that lasts.
Screenshots
Verdict
The clearest difference is in-app purchases: RGB_Light at none against 23Brain's 4. On price, update cadence, ads and device support 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. 23Brain sells 4 in-app purchases, starting at $12.99 per month. RGB_Light asks for nothing beyond the download.
RGB_Light ships an update every 10 days, 23Brain every 8 days. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.
| Parameter | RGB_Light | 23Brain |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.4 — better | 13.0 |
| Further details — not scored | ||
| Size | 36 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | Shiftall Inc. | Felix Seip |
In-app purchases
RGB_Light
No in-app purchases
23Brain
- Pro (Monthly)3 Days trial$12.991 Month
- Ultra (Monthly)3 Days trial$24.991 Month
- Pro (Yearly)3 Days trial$99.991 Year
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- Ultra (Yearly)3 Days trial$249.991 Year









