# SIGMO vs Shift Calendar, Work Calendar

The clearest difference is price: Shift Calendar, Work Calendar at Free against SIGMO's $1.99. SIGMO's advantage is in-app purchases (none vs 3) and update cadence (every 5 weeks vs every 3 months). On ads and device support there is nothing between them.

Shift Calendar, Work Calendar is free to download; SIGMO costs $1.99 up front. Shift Calendar, Work Calendar sells 3 in-app purchases, starting at $3.99 per month. SIGMO asks for nothing beyond the download.

SIGMO ships an update every 5 weeks, Shift Calendar, Work Calendar every 3 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | SIGMO | Shift Calendar, Work Calendar |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/shift-calendar-work-calendar/id6738417701/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 25 MB | 7 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Manuel Javorik](https://appshunter.io/developer/1021365313) | [Faycal Bessayah](https://appshunter.io/developer/1691545197) |

## What reviewers say

### SIGMO

[App page](https://appshunter.io/ios/app/sigmo/id1021365314)

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

**In-app purchases:** none


### Shift Calendar, Work Calendar

[App page](https://appshunter.io/ios/app/shift-calendar-work-calendar/id6738417701)

Manage your work schedule and track earnings with this comprehensive shift work manager. Easily add shifts, set up custom rotations, and calculate wages accurately. Export earnings reports to CSV for accounting or sharing.

**Highlights:** Effortless shift management, Custom rotation setup, Comprehensive wage tracking, Accurate earnings calculation, Detailed earnings reports, CSV export for reports, On-device privacy

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| Yearly Subscription | $12.99 | per year |
| Lifetime Purchase | $24.99 | one-time |


## Frequently asked questions

### Is SIGMO free?

SIGMO costs $1.99, with no in-app purchases.

### Is Shift Calendar, Work Calendar free?

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

### Do SIGMO or Shift Calendar, Work Calendar have ads?

Neither SIGMO nor Shift Calendar, Work Calendar shows ads.

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

SIGMO ships an update every 5 weeks, and Shift Calendar, Work Calendar every 3 months. Most recently, SIGMO was updated on November 1, 2026 and Shift Calendar, Work Calendar on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*