# Calculator+ Simple Math vs UID.one

The clearest difference is iOS requirement: Calculator+ Simple Math at 13.0 against UID.one's 15.1. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Calculator+ Simple Math | UID.one |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Size | 19 MB | 50 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Space 64 LLC](https://appshunter.io/developer/1769185943) | [TRIP EXPRESS VIETNAM COMPANY LIMITED](https://appshunter.io/developer/6774900975) |

## What reviewers say

### Calculator+ Simple Math

[App page](https://appshunter.io/ios/app/calculator-plus-simple-math/id6764523918)

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

**In-app purchases:** none


### UID.one

[App page](https://appshunter.io/ios/app/uidone-passkey-and-digital-id/id6774900973)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calculator+ Simple Math free?

Calculator+ Simple Math is free to download, with no in-app purchases.

### Is UID.one free?

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

### Do Calculator+ Simple Math or UID.one have ads?

Neither Calculator+ Simple Math nor UID.one 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.*