# Reference. vs ShiftBell

The clearest difference is ads: ShiftBell at none against Reference.'s shown. Reference.'s advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.4). On price and in-app purchases there is nothing between them.

Both are free to download. Reference. sells 2 in-app purchases, starting at $1.99 per month and ShiftBell sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Reference. | ShiftBell |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Weekly |
| Size | 68 MB | 16 MB |
| Requires iOS | **15.1** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CHADLEY JORDAN CADMAN](https://appshunter.io/developer/1896337420) | [SEONG MIN LEE](https://appshunter.io/developer/6794776142) |

## What reviewers say

### Reference.

[App page](https://appshunter.io/ios/app/reference/id6792243639)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.99 | per month |
| Premium Annual | $9.99 | per year |


### ShiftBell

[App page](https://appshunter.io/ios/app/shiftbell-shift-work-alarm/id6794776140)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ShiftBell Pro Monthly | $2.99 | per month |
| ShiftBell Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is Reference. free?

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

### Is ShiftBell free?

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

### Do Reference. or ShiftBell have ads?

Reference. shows ads; ShiftBell does not.

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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.*