# Daysium vs BACKI

The clearest difference is in-app purchases: Daysium at none against BACKI's 1. Daysium also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. BACKI sells 1 one-off in-app purchase. Daysium asks for nothing beyond the download.

## The numbers

| Metric | Daysium | BACKI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 74 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daysium](https://appshunter.io/developer/1710368241) | [Wai Hung Chiu](https://appshunter.io/developer/6805523238) |

## What reviewers say

### Daysium

[App page](https://appshunter.io/ios/app/daysium/id6468661740)

**Features:** macOS Compatibility

**In-app purchases:** none


### BACKI

[App page](https://appshunter.io/ios/app/backi/id6808651075)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BACKI Full | $4.99 | one-time |


## Frequently asked questions

### Is Daysium free?

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

### Is BACKI free?

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

### Do Daysium or BACKI have ads?

Neither Daysium nor BACKI 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.*