Comparison

openote vs Prompt Planter

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

openote

Features
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openote β€” Markdown notes with free sync. No account. No subscription. Other note apps charge a yearly fee just to sync your own devices. openote syncs iPhone, iPad and Mac through your iCloud Drive β€” free, with no account to create. Your notes stay plain .md files. Open them in the Files app or any Markdown editor, and take them anywhere. No proprietary format, no lock-in. --- WHY OPENOTE Free iCloud sync Notes sync through iCloud Drive on your own Apple account. No sign-up, no subscription. Plain Markdown files Every note is a standard .md file. Front matter, checklists and [[wiki links]] are kept exactly as you wrote them. Safe across devices If a note changes on another device while you're editing, openote keeps both versions instead of silently overwriting one. Your last words are saved even if you switch apps or quit right away. Mermaid diagrams Flowcharts, sequence diagrams and more render live from Markdown. Start from a template, pinch to zoom, tap to edit the code. Rendering works offline. On-device AI On devices with Apple Intelligence, summarize a note, get tag suggestions, or turn a sentence into a diagram. It runs entirely on your device β€” nothing is sent to a server. --- FEATURES Editor - Rich Markdown editing, with a source mode when you want the raw text - Checklists, tables and code blocks - Auto-save - Word and character count Organize - Folders and #tags with autocomplete - [[Wiki links]] between notes - Full-text search in English, Korean and Japanese Sync & files - iPhone, iPad and Mac via iCloud Drive - Browse your notes in the Files app - Export a note as PDF Shortcuts & Siri - Create, open and search notes from Shortcuts and Siri - Notes appear in Spotlight search --- PRIVACY - No account, no email - No tracking - Your notes stay in your iCloud and on your devices - AI runs on your device Everything is free. openote has no in-app purchases. openote β€” Your notes, your files.

About

Prompt Planter

Features
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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

openote4 screens
Prompt Planter4 screens

Verdict

The call

The clearest difference is iOS requirement: openote at 17.0 against Prompt Planter's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

openote ships an update every 5 weeks, Prompt Planter monthly. The most recent releases landed on September 30, 2026 and October 8, 2026 respectively.

Scorecard1 real difference Β· 5 level
openote versus Prompt Planter: the parameters behind the verdict, then further details
ParameteropenotePrompt Planter
PriceFreeFree
Update frequencyEvery 5 weeksMonthly β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 β€” better26.0
Further details β€” not scored
Size8 MB3 MB
Age rating4+4+
DeveloperWooyoung KimYusuke Nakashima

In-app purchases

None

openote

No in-app purchases

None

Prompt Planter

No in-app purchases

Questions

Is openote free?
openote is free to download, with no in-app purchases.
Is Prompt Planter free?
Prompt Planter is free to download, with no in-app purchases.
Do openote or Prompt Planter have ads?
Neither openote nor Prompt Planter shows ads.
Which is updated more often, openote or Prompt Planter?
openote ships an update every 5 weeks, and Prompt Planter monthly. Most recently, openote was updated on September 30, 2026 and Prompt Planter on October 8, 2026.

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