Comparison

Mermaid Editor vs Preloop

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

Head to head
About

Mermaid Editor

Create and visualize complex diagrams on your mobile device with a powerful editor. Supports real-time previews, syntax highlighting, and a wide range of chart types. Export your work in various formats and manage files locally.

Highlights
  • Real-time live preview
  • Full syntax highlighting
  • Support for all chart types
  • Template gallery for learning
  • Powerful file management
  • Professional export options
  • Offline mode support
Features
Read full description

Bring your ideas to life with the power of Mermaid Live Editor - anytime, anywhere. Whether you are a developer mapping out system architecture, a student visualizing logic, or a project manager building Gantt charts, Mermaid Live Editor is the ultimate mobile workspace for Mermaid diagrams. No more waiting to get back to your desk; write code and visualize complex charts directly on your phone with a seamless, high-performance editor. Key Features: - Real-Time Live Preview: See your diagrams take shape as you type. Our split-screen or toggle view ensures your visual logic matches your code instantly. - Full Syntax Highlighting: Write clean, readable code with an editor designed specifically for Mermaid syntax. - Support for All Chart Types: Flowchart, Sequence Diagram, Class Diagram, State Diagram, Entity Relationship Diagram, User Journey, Gantt, Pie Chart, Quadrant Chart, Requirement Diagram, GitGraph Diagram, C4 Diagram, Mindmap, Timeline, Zenuml, Sankey, XYChart Diagram, Block Diagram, Packet Diagram, Kanban Diagram, Architecture Diagram, Radar Diagram, Treemap Diagram. - Learn & Template Gallery: New to Mermaid? Browse our library of examples to learn the syntax and kickstart your projects with one tap. - Powerful File Management: Open, edit, and save .mmd files directly. Keep your workflow consistent across your mobile and desktop environments. - Professional Exports: Share your work in high resolution. Export your diagrams in PNG, JPEG, WebP, SVG, or PDF formats. - Offline Mode Support: No internet? No problem. Generate and preview diagrams locally without needing a network connection. Why Choose Mermaid Live Editor? - Speed: Light-weight and optimized for mobile performance. - Versatility: Perfect for documentation, software design, and business presentations. - Privacy: Your data stays on your device. Turn complex thoughts into beautiful diagrams with Mermaid Chart Editor. Download now and start creating! Term of Use: https://termux-studio.org/terms-of-use?name=Mermaid Privacy Policy: https://termux-studio.org/privacy-policy?name=Mermaid

About

Preloop

This app acts as a human approval layer for AI agents, intercepting risky actions and routing them for your one-tap approval. It allows AI to handle routine tasks while you maintain control over critical decisions, ensuring compliance and an audit trail.

Highlights
  • Human approval for AI actions
  • Instant notifications with context
  • One-tap approve/decline
  • Audit trail for compliance
  • Risk-based policy enforcement
  • Works with Claude and Cursor
Features
Read full description

Preloop is the human approval layer for autonomous AI agents. When your agents attempt risky actions like deployments, refunds, or data changes, Preloop intercepts the request and routes it to you for approval right on your iPhone or Apple Watch. The right people in your organization get instant notifications with full context, approve or decline with one tap, while your organization maintains a complete audit trail for compliance. Preloop enables event-driven automation through Agentic Flows - let AI agents handle routine work automatically while you control critical decisions. Setup takes 3 minutes as an MCP proxy, works with Claude and Cursor, and requires no infrastructure changes. Risk-based policies ensure only high-stakes actions need approval while low-risk operations run automatically. AI agents can't take legal or moral responsibility for their actions - Preloop ensures humans stay in control. Perfect for engineering teams, DevOps, and anyone deploying autonomous AI in production. Enterprise-ready, designed for SOC2 compliance, role-based access, and secure end-to-end encryption.

Screenshots

Mermaid Editor4 screens
Preloop2 screens

Verdict

The call

The clearest difference is in-app purchases: Preloop at none against Mermaid Editor's 3. Preloop also leads on ads (none vs shown) and rating (5.0 vs 4.7). Mermaid Editor's advantage is update cadence (every 5 days vs every 3 months) and ratings volume (13 vs 1). On price, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Mermaid Editor sells 3 in-app purchases, starting at $2.99 per month. Preloop asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Preloop holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Mermaid Editor has 13 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Mermaid Editor ships an update every 5 days, Preloop every 3 months. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
Mermaid Editor versus Preloop: the parameters behind the verdict, then further details
ParameterMermaid EditorPreloop
PriceFreeFree
Rating4.7 (13 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings13 — better1
Update frequencyEvery 5 days — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS13.0 — better18.2
Further details — not scored
Size40 MB4 MB
Age rating4+4+
DeveloperTERMUX LIMITED LIABILITY COMPANYSpacecode AI Inc

Customer experience

Mermaid Editor

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Preloop

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Mermaid Editor

Subscriptions2
  • Mermaid Pro Monthly$2.991 Month
  • Mermaid Pro$12.991 Year
One-time1
  • Mermaid Lifetime$34.99
None

Preloop

No in-app purchases

Questions

Is Mermaid Editor free?
Mermaid Editor is free to download, with in-app purchases available.
Is Preloop free?
Preloop is free to download, with no in-app purchases.
Which has better reviews, Mermaid Editor or Preloop?
Preloop is rated higher. Mermaid Editor averages 4.7 out of 5 from 13 ratings, while Preloop averages 5.0 from 1 ratings.
Do Mermaid Editor or Preloop have ads?
Mermaid Editor shows ads; Preloop does not.
Which is updated more often, Mermaid Editor or Preloop?
Mermaid Editor ships an update every 5 days, and Preloop every 3 months. Most recently, Mermaid Editor was updated on November 9, 2026 and Preloop on November 5, 2026.

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