# MarkChart vs Preloop

The clearest difference is rating: Preloop at 5.0 against MarkChart's 4.0. Preloop also leads on in-app purchases (none vs 1). MarkChart's advantage is update cadence (every 3 weeks vs every 3 months) and ratings volume (14 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. MarkChart sells 1 one-off in-app purchase. Preloop asks for nothing beyond the download.

Preloop holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: MarkChart has 14 ratings behind it against 1, so its average is the more settled of the two.

MarkChart ships an update every 3 weeks, Preloop every 3 months. The most recent releases landed on November 12, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | MarkChart | Preloop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (14 ratings)](https://appshunter.io/ios/app/markchart-mermaid-editor/id6475648822/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/preloop/id6757803021/reviews)** |
| Number of ratings | **14** | 1 |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 56 MB | 4 MB |
| Requires iOS | 18.2 | 18.2 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Alexandre Colucci](https://appshunter.io/developer/1478787437) | [Spacecode AI Inc](https://appshunter.io/developer/1854261683) |

## What reviewers say

### MarkChart

[App page](https://appshunter.io/ios/app/markchart-mermaid-editor/id6475648822)

This app allows you to easily create and preview diagrams using a Markdown-inspired text syntax. It offers templates for various diagram types and supports automatic updates when used with external editors. Export your creations to common image formats.

**Highlights:** Mermaid diagram editing, Real-time preview, Built-in templates, Automatic updates, Export to PDF, PNG, SVG, Syntax highlighting, Dark Mode support

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MarkChart Pro | $12.99 | one-time |


### Preloop

[App page](https://appshunter.io/ios/app/preloop/id6757803021)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MarkChart free?

MarkChart 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, MarkChart or Preloop?

Preloop is rated higher. MarkChart averages 4.0 out of 5 from 14 ratings, while Preloop averages 5.0 from 1 ratings.

### Do MarkChart or Preloop have ads?

Neither MarkChart nor Preloop shows ads.

### Which is updated more often, MarkChart or Preloop?

MarkChart ships an update every 3 weeks, and Preloop every 3 months. Most recently, MarkChart was updated on November 12, 2026 and Preloop on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*