# Build Things vs Atomic Calendar

The clearest difference is iOS requirement: Atomic Calendar at 13.0 against Build Things'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 | Build Things | Atomic Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 days | — |
| Size | 146 MB | 75 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erik Nelson](https://appshunter.io/developer/1816102691) | [Brandon Guigo](https://appshunter.io/developer/1772643694) |

## What reviewers say

### Build Things

[App page](https://appshunter.io/ios/app/build-things/id6752671589)

**Features:** macOS Compatibility

**In-app purchases:** none


### Atomic Calendar

[App page](https://appshunter.io/ios/app/atomic-calendar/id6757757656)

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

**In-app purchases:** none


## Frequently asked questions

### Is Build Things free?

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

### Is Atomic Calendar free?

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

### Do Build Things or Atomic Calendar have ads?

Neither Build Things nor Atomic Calendar shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*