Promptron vs Metis
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Promptron
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Promptron is an on-device prompt workspace for turning rough intent into a structured request aligned to the Claude or Codex/ChatGPT product surface you choose. It combines bundled capability guidance, local organization, and reviewable evaluation signals. It does not promise objectively βbetterβ prompts or guarantee AI output. WRITE FOR THE TARGET YOU CHOOSE β’ Choose a Claude or Codex/ChatGPT target independently from the provider that writes the prompt. β’ Use bundled, target-specific capability guidance. β’ Review structured sections, compatibility checks, and transparent static or model-assisted evaluation signals. BRING YOUR OWN KEY β’ Add an Anthropic or OpenAI API key in Settings. β’ Requests go directly from your device to the matching provider. Promptron has no model-request proxy. β’ If both providers are configured, an allowed fallback provider can still prepare the selected target prompt without changing its target guidance. β’ Provider usage is billed separately under your Anthropic or OpenAI account. PRIVATE BY DESIGN β’ Projects, conversations, generated prompts, scores, and local profiles stay on your device. β’ Provider keys are stored separately in Keychain. β’ Promptron contains no advertising, Promptron analytics, or cross-app tracking. β’ Before a provider first receives content for the current local profile, Promptron explains what may be sent and asks for permission. Anthropic and OpenAI permissions are separate and revocable. WORK YOUR WAY β’ Organize conversations in an on-device workspace. β’ Add selected files, images, or web references when relevant. β’ Use on-device dictation where the language and device support it. β’ Copy results. Pro adds additional prompt forms, full bundled retrieval, multi-project organization, live evaluation, and HTML export. PROMPTRON PRO Promptron Pro Monthly is a one-month, auto-renewable subscription that unlocks app features. It does not include Anthropic or OpenAI usage. The localized price is shown before purchase. Payment is charged to your Apple Account at confirmation. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel through your Apple Account. Restore Purchases is available in the Pro screen. AI output and evaluation signals may be inaccurate and are not professional advice. Verify results before relying on them. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://godricchoice-mel.github.io/promptron-support/privacy.html
Metis
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Metis is a native Markdown editor and local-first knowledge base. Your notes are just .md files in a folder you own - Metis is a fast, beautiful, native view over them. No lock-in, no proprietary format, no account required to write. WRITE IN LIVE PREVIEW A clean Obsidian-style editor styles your Markdown as you type - headings, bold, lists, quotes and code - while keeping the raw syntax one tap away. It feels like writing in a document, not in code. On iPad it's a full three-pane workspace with hardware-keyboard shortcuts. CONNECT YOUR IDEAS Link any two notes with [[wiki links]]. Backlinks appear automatically, so you always see what references the note you're reading. An interactive link graph shows your whole knowledge base at a glance - zoom, pan, and drag nodes to explore the connections. READ BEAUTIFULLY Reading mode renders the full document: headings, tables, task lists, images, syntax-highlighted code, Mermaid diagrams, and real math (LaTeX) rendered natively - no web view. ORGANIZE YOUR WAY Tag anything with #tags, group notes into folders, and see typed properties (status, owner, due...) that live as YAML front matter and are preserved as you edit. A fast switcher and full-text search get you anywhere instantly. ON-DEVICE AI (Apple Intelligence) Summarize a note, suggest tags or related links, and ask your whole vault a question - all running privately on your device. AI is optional; the app is fully functional without it. SYNC ACROSS YOUR DEVICES Keep your vault in iCloud and the same notes are on your Mac, iPad and iPhone - still as plain .md files you can open anywhere. Edits sync in the background, and Metis helps you resolve conflicts if two devices change the same note. LOCK WHAT MATTERS Any note can be locked with your notes password and opened with Face ID or Touch ID. Locked notes are encrypted on disk and stay encrypted in iCloud - and they're kept out of search and previews. PRIVATE AND YOURS Everything stays in plain files on your device. No tracking, no cloud lock-in. Open the same folder in any other Markdown editor whenever you like. Import an existing folder of notes (from Obsidian or anywhere) and Metis just works. ONE PURCHASE, ALL YOUR DEVICES A single one-time purchase unlocks Metis Pro on your Mac, iPad and iPhone - no subscription. Try everything free for 7 days. Metis is made by Empiric Apps. Questions or feedback? contact@empiricapps.com
Screenshots
Verdict
The clearest difference is update cadence: Metis at every 2 days against Promptron's every 3 weeks. On price, ads, in-app purchases and device support 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
Both are free to download. Promptron sells 1 in-app purchase, starting at $4.99 per month and Metis sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Promptron ships an update every 3 weeks, Metis every 2 days. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.
| Parameter | Promptron | Metis |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 2 days β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Mac β better | iPhone, iPad |
| Requires iOS | 17.0 β better | 18.0 |
| Further details β not scored | ||
| Size | 8 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | YIMING WANG | Burlac Mihail |
In-app purchases
Promptron
- Promptron Pro$4.991 Month
Metis
- Metis Pro$14.99









