# OnePrompt vs DeviceAI

The clearest difference is price: OnePrompt at Free against DeviceAI's $2.99. OnePrompt also leads on update cadence (every 5 days vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

OnePrompt is free to download; DeviceAI costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OnePrompt ships an update every 5 days, DeviceAI monthly. Both last shipped on October 31, 2026.

## The numbers

| Metric | OnePrompt | DeviceAI |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/oneprompt-ai-prompt-builder/id6759237141/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Free | — |
| Size | 2 MB | 34 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Soto](https://appshunter.io/developer/1877580647) | [Evan Yeoh](https://appshunter.io/developer/873959340) |

## What reviewers say

### OnePrompt

[App page](https://appshunter.io/ios/app/oneprompt-ai-prompt-builder/id6759237141)

This app helps you create effective AI prompts without needing to learn prompt engineering. Simply describe your needs in plain language, answer a few questions, and get a perfectly crafted prompt for popular AI models.

**Highlights:** AI prompt generation from plain language, No prompt engineering required, Smart questioning for prompt refinement, Optimized output for ChatGPT, Claude, Gemini, 14 ready-to-use templates, Works with existing AI tools

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

**In-app purchases:** none


### DeviceAI

[App page](https://appshunter.io/ios/app/deviceai/id6760162343)

**In-app purchases:** none


## Frequently asked questions

### Is OnePrompt free?

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

### Is DeviceAI free?

DeviceAI costs $2.99, with no in-app purchases.

### Do OnePrompt or DeviceAI have ads?

Neither OnePrompt nor DeviceAI shows ads.

### Which is updated more often, OnePrompt or DeviceAI?

OnePrompt ships an update every 5 days, and DeviceAI monthly. Most recently, OnePrompt was updated on October 31, 2026 and DeviceAI on October 31, 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.*