# TESS Services vs Skiftkalender

The clearest difference is price: TESS Services at Free against Skiftkalender's $5.99. Skiftkalender's advantage is update cadence (every 5 days vs every 21 months) and iOS requirement (13.4 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

TESS Services is free to download; Skiftkalender costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TESS Services ships an update every 21 months, Skiftkalender every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TESS Services | Skiftkalender |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 5 days** |
| Size | 365 MB | 21 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TESS as](https://appshunter.io/developer/916176940) | [THOMAS GRAVDAL](https://appshunter.io/developer/1729760524) |

## What reviewers say

### TESS Services

[App page](https://appshunter.io/ios/app/tess-services/id1551100621)

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

**In-app purchases:** none


### Skiftkalender

[App page](https://appshunter.io/ios/app/skiftkalender/id6499107910)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TESS Services free?

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

### Is Skiftkalender free?

Skiftkalender costs $5.99, with no in-app purchases.

### Do TESS Services or Skiftkalender have ads?

Neither TESS Services nor Skiftkalender shows ads.

### Which is updated more often, TESS Services or Skiftkalender?

TESS Services ships an update every 21 months, and Skiftkalender every 5 days. Most recently, TESS Services was updated on October 24, 2026 and Skiftkalender on October 25, 2026.

---

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