# ShiftMaster vs Sigma Notepad Calculator

The clearest difference is in-app purchases: ShiftMaster at none against Sigma Notepad Calculator's 3. ShiftMaster also leads on device support (3 vs 1) and iOS requirement (15.5 vs 17.0). Sigma Notepad Calculator's advantage is update cadence (fortnightly vs every 2 months). On price and ads there is nothing between them.

Both are free to download. Sigma Notepad Calculator sells 3 in-app purchases, starting at $1.99 per month. ShiftMaster asks for nothing beyond the download.

ShiftMaster ships an update every 2 months, Sigma Notepad Calculator fortnightly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ShiftMaster | Sigma Notepad Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 101 MB | 16 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Burak Esen](https://appshunter.io/developer/1848571872) | [Soules Studio Ltd](https://appshunter.io/developer/1883253392) |

## What reviewers say

### ShiftMaster

[App page](https://appshunter.io/ios/app/shiftmaster-mesai-takip/id6763834335)

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

**In-app purchases:** none


### Sigma Notepad Calculator

[App page](https://appshunter.io/ios/app/sigma-notepad-calculator/id6768903761)

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $14.99 | per year |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is ShiftMaster free?

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

### Is Sigma Notepad Calculator free?

Sigma Notepad Calculator is free to download, with in-app purchases available.

### Do ShiftMaster or Sigma Notepad Calculator have ads?

Neither ShiftMaster nor Sigma Notepad Calculator shows ads.

### Which is updated more often, ShiftMaster or Sigma Notepad Calculator?

ShiftMaster ships an update every 2 months, and Sigma Notepad Calculator fortnightly. Most recently, ShiftMaster was updated on October 25, 2026 and Sigma Notepad Calculator on October 28, 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.*