# Formula Lab vs ShiftProCalendar

The clearest difference is ads: ShiftProCalendar at none against Formula Lab's shown. Formula Lab's advantage is iOS requirement (13.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Formula Lab sells 1 in-app purchase, starting at $1.99 per month and ShiftProCalendar sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Formula Lab | ShiftProCalendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Every 2 months |
| Size | 49 MB | 20 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Yusuke Ishino](https://appshunter.io/developer/1481440351) | [LI JUNYI](https://appshunter.io/developer/1863692375) |

## What reviewers say

### Formula Lab

[App page](https://appshunter.io/ios/app/formula-lab-calc-and-simulator/id6751499997)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $1.99 | per month |


### ShiftProCalendar

[App page](https://appshunter.io/ios/app/shiftprocalendar/id6761934926)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Lifetime Access | $29.99 | one-time |


## Frequently asked questions

### Is Formula Lab free?

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

### Is ShiftProCalendar free?

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

### Do Formula Lab or ShiftProCalendar have ads?

Formula Lab shows ads; ShiftProCalendar 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.*