ArchFlowy vs Merkdown
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ArchFlowy
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Design ERDs Anywhere — Fast, Offline, and Effortless ArchFlowy is the smoothest way to create database diagrams on the go. Built mobile‑first, it gives you the power of a desktop‑class ERD tool right in your pocket — no internet required. Offline ERD Creation Work fully offline, anytime No accounts, no syncing, no waiting Your diagrams stay private and on your device Fast & Fluid Diagramming Instant node creation and linking Zero lag, even in large diagrams Smart snapping and clean auto‑layout Mobile‑First Experience Designed for touch from the ground up Natural gestures for pan, zoom, and edit Optimized UI for small and large screens Smooth Workflow Effortless editing with intuitive controls Quick access to tables, fields, and relationships Clean, minimal interface that stays out of your way Perfect For Designing schemas on the go Brainstorming system architecture Students, developers, and anyone mapping data models EULA: This app is governed by Apple’s Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Merkdown
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Merkdown is a clean, powerful Markdown editor with built-in Mermaid diagram support and AI-powered content generation. Write and preview Markdown in real time, create beautiful diagrams, and let AI help you generate content — all in one app. KEY FEATURES Markdown Editor Write Markdown with a clean, distraction-free editor. Switch between Edit and Preview tabs instantly. Autosave keeps your work safe. Mermaid Diagrams Create flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, Gantt charts, pie charts, mindmaps, timelines, and more — 14 diagram types rendered right in the preview. AI Content Generation Let AI write Markdown and Mermaid diagrams for you. Describe what you need, choose a diagram type, and generate content instantly. Powered by advanced AI technology. Share & Export Export your work as Markdown (.md), HTML (.html), or Image (.png). Share with anyone directly from the app. HIGHLIGHTS - Real-time Markdown preview - 14 Mermaid diagram types supported - AI-powered Markdown and diagram generation - Export as Markdown, HTML, or PNG image - Open .md files from other apps - Dark mode support - Autosave option - Available in 8 languages - Free to use (watch ads for AI coins) Write it down. Mermaid it out. Merkdown.
Screenshots
Verdict
The clearest difference is in-app purchases: Merkdown at none against ArchFlowy's 1. Merkdown also leads on iOS requirement (16.0 vs 18.2). ArchFlowy's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 3 months). On price 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. ArchFlowy sells 1 in-app purchase, starting at $1.99 per month. Merkdown asks for nothing beyond the download.
ArchFlowy ships an update every 2 weeks, Merkdown every 3 months. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | ArchFlowy | Merkdown |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.2 | 16.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 33 MB |
| Age rating | 4+ | 17+ |
| Developer | Timmy Nguyen | HYUNWOO LEE |
In-app purchases
ArchFlowy
- Monthly Subscription7 Days trial$1.991 Month
Merkdown
No in-app purchases









