# Modulus Calculator vs On‑Device AI

The clearest difference is review sentiment: Modulus Calculator at 100% against On‑Device AI's 64%. Modulus Calculator also leads on in-app purchases (none vs 4) and rating (4.8 vs 4.4). On‑Device AI's advantage is ratings volume (162 vs 8) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. On‑Device AI sells 4 in-app purchases, starting at $3.99 per month. Modulus Calculator asks for nothing beyond the download.

Modulus Calculator holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: On‑Device AI has 162 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 100% of Modulus Calculator's written reviews are positive against 64% of On‑Device AI's.

## The numbers

| Metric | Modulus Calculator | On‑Device AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (8 ratings)](https://appshunter.io/ios/app/modulus-calculator/id1432356578/reviews)** | [4.4 (162 ratings)](https://appshunter.io/ios/app/ondevice-aiprivate-workspace/id6497060890/reviews) |
| Number of ratings | 8 | **162** |
| Positive reviews | **100.0% of reviews** | 63.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 1.8 GB |
| Requires iOS | **11.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 17+ |
| Developer | [Theodore Dubois](https://appshunter.io/developer/1432356577) | [Zijie Deng](https://appshunter.io/developer/1070117038) |

## What reviewers say

### Modulus Calculator

[App page](https://appshunter.io/ios/app/modulus-calculator/id1432356578)

This utility app functions as a standard calculator but performs all operations within a specified modulus. It supports powers and inverses, with division implemented through multiplication by the inverse. Easily switch the modulus using the dedicated indicator.

**Highlights:** Modulus-based calculations, Support for powers and inverses, Division via modular inverse, Easy modulus switching, Calculator interface

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Modulus Calculator free?

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

### Is On‑Device AI free?

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

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

Modulus Calculator is rated higher. Modulus Calculator averages 4.8 out of 5 from 8 ratings, while On‑Device AI averages 4.4 from 162 ratings.

### Do Modulus Calculator or On‑Device AI have ads?

Neither Modulus Calculator nor On‑Device AI 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.*