# On‑Device AI vs Testify

The clearest difference is rating: Testify at 5.0 against On‑Device AI's 4.4. On‑Device AI's advantage is ratings volume (162 vs 1) and device support (4 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. On‑Device AI sells 4 in-app purchases, starting at $3.99 per month and Testify sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Testify holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: On‑Device AI has 162 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | On‑Device AI | Testify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (162 ratings)](https://appshunter.io/ios/app/ondevice-aiprivate-workspace/id6497060890/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/testify-ab-testing-tool/id6761442039/reviews)** |
| Number of ratings | **162** | 1 |
| Positive reviews | 63.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | Freemium |
| Size | 1.8 GB | 4 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Zijie Deng](https://appshunter.io/developer/1070117038) | [Rowena Ricalde](https://appshunter.io/developer/634576161) |

## What reviewers say

### On‑Device AI

[App page](https://appshunter.io/ios/app/ondevice-aiprivate-workspace/id6497060890)

Transform your device into a private AI assistant for meetings and complex tasks. Features include speaker diarization, live transcription, and specialized subagents for research, analysis, and writing. Control your AI via messaging apps, with options for 100% offline processing or cloud connectivity.

**Highlights:** Speaker Diarization for meeting transcripts, Real-time live transcription, Natural AI speech generation, Deploy specialized AI subagents, AI-powered web browser automation, Control AI via messaging apps, 100% offline processing option

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Member Subscription | $3.99 | per month |
| Pro Member Subscription | $34.99 | per year |
| Lifetime Pro Member | $49.99 | one-time |
| Lifetime Pro Member | $99.99 | one-time |

**What reviewers like**

- 🚀 Game-changing AI assistant
- 🔍 Powerful search functionality
- 👍 Customizable and versatile
- 🌐 Seamless multi-device experience
- 💡 Innovative character-based interactions

**What reviewers complain about**

- 🐛 Crashes on larger models
- 🔋 Heating issues on some devices
- 🔍 Slow and unreliable web search
- 💻 Buggy on macOS

**Reported bugs**

- Crashes on startup
- Model selection issues
- Inability to copy generated text

**Requested features**

- Automated multi-character conversations
- Character set saving and syncing
- Streamlined search integration
- UI optimization for icons
- Remote endpoint support for multi-agents


### Testify

[App page](https://appshunter.io/ios/app/testify-ab-testing-tool/id6761442039)

This app helps you conduct scientific experiments in your daily life. Define a hypothesis, track your results, and get clear, statistical explanations of whether your findings are significant. It supports various statistical tests and offers visual data analysis.

**Highlights:** Create experiments with hypotheses, Track daily results and notes, Automatic statistical analysis, Visual charts and confidence intervals, Plain-English result explanations, CSV import/export (Pro), PDF report export (Pro)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $1.99 | per month |


## Frequently asked questions

### Is On‑Device AI free?

On‑Device AI is free to download, with in-app purchases available.

### Is Testify free?

Testify is free to download, with in-app purchases available.

### Which has better reviews, On‑Device AI or Testify?

Testify is rated higher. On‑Device AI averages 4.4 out of 5 from 162 ratings, while Testify averages 5.0 from 1 ratings.

### Do On‑Device AI or Testify have ads?

Neither On‑Device AI nor Testify shows ads.

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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.*