BruSynk vs Prompt Planter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BruSynk
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BruSynk(ブルシンク)は、無関係な言葉を強制的につなぎ合わせることで新しい発想を引き出す「ブルートシンク法」に基づいた発想支援アプリです。 【特徴】 - ランダムに提示される言葉を課題に結びつけ、アイデアの着想を促進 - シンプルで直感的な操作、すぐに使えるインターフェース - 思いついたアイデアをメモとして保存・振り返り可能 【こんな方におすすめ】 - 新しいアイデアを考える企画職やクリエイター - 日常の問題解決や学習に創造的な視点を取り入れたい方 - ブレインストーミングを一人でも気軽に実践したい方 偶然の出会いからアイデアが生まれる。 BruSynkがあなたの発想を強力にサポートします。
Prompt Planter
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Write, test, and grow your prompts. Track versions of your AI prompts with diff view, version restore, and {{template}} variables - now synced across iPhone, iPad, and Mac. Prompt Planter is a calm, private home for the AI prompts you actually want to keep. If you reuse the same prompts across different AI assistants, you know the pain: the good version is buried somewhere in a chat history, and you end up rewriting it from scratch. Prompt Planter lets you save your best prompts, improve them over time, and grab the right one in seconds. THE SAME LIBRARY ON EVERY DEVICE - Syncs automatically over iCloud. Start a draft on your iPhone and finish it on your iPad or Mac. - Nothing to set up. If you are signed in to iCloud, everything is already there when you open the app. - You can check the sync status any time in Settings. GROW YOUR PROMPTS - Keep prompts, project instructions, skills, CLAUDE.md files, and system prompts in one library. - Every prompt has a full version history. Save a new version whenever you tweak it, with a short note on what changed. - See exactly what changed between versions, highlighted with + and - marks. - Restore any past version at any time. Restoring adds a new revision, so your history is never lost. - Rate each version and record how it actually performed, so you always know which one works best. ONE PROMPT, TUNED FOR EVERY AI - Create variants of the same prompt for different models. - Tag prompts by AI and by purpose so you can find exactly what you need. Give AI tags a color to tell them apart at a glance. - Duplicate a whole prompt, version history included, when you want to take it in a different direction. CAPTURE IDEAS FAST - Jot a quick draft, then save it to your library as a new prompt, a new version, or a new variant. - One-tap copy to the clipboard, ready to paste into any chat. - Write {{name}} in a prompt body and a fill-in form appears when you copy it or send it to Drafts. FIND WHAT YOU ARE LOOKING FOR - Pin your go-to prompts to the top. - Mark favorites and filter by kind, AI, or purpose. - Search covers change notes and result notes too, not just the prompt body, so you can find that one insight you wrote down. - Your sort order and filters are remembered between launches. YOUR DATA STAYS YOURS - No account, no sign-in, no ads, no tracking. - Sync uses your own iCloud private database. The developer cannot see its contents. - Not using iCloud? Everything stays on your device and every feature still works. - Export and import your whole library as a JSON file for backup or moving between devices. FULLY BILINGUAL - Use the app in English or Japanese, switchable anytime. Prompt Planter is designed to be quiet, fast, and out of your way, so your prompts can grow alongside your work.
Screenshots
Verdict
The clearest difference is ads: Prompt Planter at none against BruSynk's shown. BruSynk's advantage is update cadence (every 2 weeks vs monthly) and iOS requirement (15.1 vs 26.0). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
BruSynk ships an update every 2 weeks, Prompt Planter monthly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | BruSynk | Prompt Planter |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 24 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Kanji Goto | Yusuke Nakashima |
In-app purchases
BruSynk
No in-app purchases
Prompt Planter
No in-app purchases









