# OneLLM vs BigWrite Markdown

The clearest difference is price: OneLLM at Free against BigWrite Markdown's $14.99. OneLLM also leads on iOS requirement (16.4 vs 18.2). On update cadence, ads, in-app purchases and device support there is nothing between them.

OneLLM is free to download; BigWrite Markdown costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OneLLM ships an update fortnightly, BigWrite Markdown every 3 weeks. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | OneLLM | BigWrite Markdown |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | **[4.5 (29 ratings)](https://appshunter.io/ios/app/onellm-opencode-and-ds-harness/id6737907910/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 145 MB | 15 MB |
| Requires iOS | **16.4** | 18.2 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [ESOTECH Ltd](https://appshunter.io/developer/1777749632) | [David Johnson](https://appshunter.io/developer/1783793867) |

## What reviewers say

### OneLLM

[App page](https://appshunter.io/ios/app/onellm-opencode-and-ds-harness/id6737907910)

This app offers advanced AI capabilities with both cloud and local processing for privacy and performance. It includes features like offline OCR, voice-to-text, password generation, and QR code scanning. Developers can customize and load thousands of models from Hugging Face.

**Highlights:** Dual AI engine (cloud & local), Offline OCR document scanning, Offline voice-to-text transcription, Password generator & QR code scanner, Developer Mode for custom LLM loading, API integration (OpenAI, Claude), Parameter tuning for LLMs

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

**In-app purchases:** none


### BigWrite Markdown

[App page](https://appshunter.io/ios/app/bigwrite-markdown/id6753015128)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is OneLLM free?

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

### Is BigWrite Markdown free?

BigWrite Markdown costs $14.99, with no in-app purchases.

### Do OneLLM or BigWrite Markdown have ads?

Neither OneLLM nor BigWrite Markdown shows ads.

### Which is updated more often, OneLLM or BigWrite Markdown?

OneLLM ships an update fortnightly, and BigWrite Markdown every 3 weeks. Most recently, OneLLM was updated on November 8, 2026 and BigWrite Markdown on October 30, 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.*