# OpenMark vs OneUptime On

The clearest difference is price: OneUptime On at Free against OpenMark's $9.99. OneUptime On also leads on update cadence (every 6 days vs every 6 months) and iOS requirement (16.4 vs 18). OpenMark's advantage is chart position (#52 vs unranked). On ads, in-app purchases and device support there is nothing between them.

OneUptime On is free to download; OpenMark costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OpenMark ships an update every 6 months, OneUptime On every 6 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | OpenMark | OneUptime On |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/oneuptime-on-call/id6759615391/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 days** |
| Monetization | Paid | **Free** |
| Best chart rank | **#52** | — |
| Size | 8 MB | 40 MB |
| Requires iOS | 18 | **16.4** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rotate, LLC.](https://appshunter.io/developer/1435998437) | [HackerBay, Inc.](https://appshunter.io/developer/1879820792) |

## What reviewers say

### OpenMark

[App page](https://appshunter.io/ios/app/openmark-markdown-viewer/id6759467015)

**Currently charting:** #52 Top Paid · Developer Tools (US App Store)

View and render markdown files with advanced features like Mermaid diagrams and LaTeX math. Supports various themes, code highlighting, and offline access. Ideal for developers and writers working with markdown on iOS devices.

**Highlights:** Mermaid diagram rendering, LaTeX math support, Code block highlighting, GitHub-style alerts, Interactive checkboxes, Offline functionality, Multiple themes

**Features:** Vision Pro support

**In-app purchases:** none


### OneUptime On

[App page](https://appshunter.io/ios/app/oneuptime-on-call/id6759615391)

Monitor and manage your online services with this comprehensive solution. It alerts your team to downtime and keeps customers informed via a status page.

**Highlights:** Monitor website availability, Track dashboard status, Check API uptime, Receive downtime alerts, Publish status pages

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OpenMark free?

OpenMark costs $9.99, with no in-app purchases.

### Is OneUptime On free?

OneUptime On is free to download, with no in-app purchases.

### Do OpenMark or OneUptime On have ads?

Neither OpenMark nor OneUptime On shows ads.

### Which is updated more often, OpenMark or OneUptime On?

OpenMark ships an update every 6 months, and OneUptime On every 6 days. Most recently, OpenMark was updated on November 5, 2026 and OneUptime On 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.*