# Bit Calculator vs Shift Work Calendar

The clearest difference is in-app purchases: Bit Calculator at none against Shift Work Calendar's 4. Bit Calculator also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.0). Shift Work Calendar's advantage is update cadence (every 9 days vs every 3 months). On price and device support there is nothing between them.

Both are free to download. Shift Work Calendar sells 4 one-off in-app purchases. Bit Calculator asks for nothing beyond the download.

Bit Calculator ships an update every 3 months, Shift Work Calendar every 9 days. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Bit Calculator | Shift Work Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 9 days** |
| Size | 11 MB | 134 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [George Tan](https://appshunter.io/developer/1090752607) | [Salomo Interiors S.L.](https://appshunter.io/developer/1688530007) |

## What reviewers say

### Bit Calculator

[App page](https://appshunter.io/ios/app/bit-calculator/id1131766195)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shift Work Calendar

[App page](https://appshunter.io/ios/app/shift-work-calendar-simple/id6751168161)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Premium | $1.99 | one-time |
| Unlock All | $1.99 | one-time |
| Unlock All + Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Bit Calculator free?

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

### Is Shift Work Calendar free?

Shift Work Calendar is free to download, with in-app purchases available.

### Do Bit Calculator or Shift Work Calendar have ads?

Shift Work Calendar shows ads; Bit Calculator does not.

### Which is updated more often, Bit Calculator or Shift Work Calendar?

Bit Calculator ships an update every 3 months, and Shift Work Calendar every 9 days. Most recently, Bit Calculator was updated on October 9, 2026 and Shift Work Calendar on October 12, 2026.

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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.*