# OnDeviceAI vs Notepad Calculator

The clearest difference is price: OnDeviceAI at Free against Notepad Calculator's $2.99. Notepad Calculator's advantage is update cadence (fortnightly vs every 3 months) and iOS requirement (17.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

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

OnDeviceAI ships an update every 3 months, Notepad Calculator fortnightly. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | OnDeviceAI | Notepad Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 21 MB | 4 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Simon Azoulay](https://appshunter.io/developer/1841888166) | [方成 印](https://appshunter.io/developer/423785440) |

## What reviewers say

### OnDeviceAI

[App page](https://appshunter.io/ios/app/ondeviceai/id6753147230)

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

**In-app purchases:** none


### Notepad Calculator

[App page](https://appshunter.io/ios/app/notepad-calculator/id6792239866)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OnDeviceAI free?

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

### Is Notepad Calculator free?

Notepad Calculator costs $2.99, with no in-app purchases.

### Do OnDeviceAI or Notepad Calculator have ads?

Neither OnDeviceAI nor Notepad Calculator shows ads.

### Which is updated more often, OnDeviceAI or Notepad Calculator?

OnDeviceAI ships an update every 3 months, and Notepad Calculator fortnightly. Most recently, OnDeviceAI was updated on October 10, 2026 and Notepad Calculator on October 13, 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.*