# SERSA Zeit vs Ortung GBT / CBT

The clearest difference is update cadence: Ortung GBT / CBT at every 3 months against SERSA Zeit's every 20 months. SERSA Zeit's advantage is iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SERSA Zeit ships an update every 20 months, Ortung GBT / CBT every 3 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SERSA Zeit | Ortung GBT / CBT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 3 months** |
| Size | 2 MB | 143 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [all4net GmbH](https://appshunter.io/developer/460914773) | [Control Center Apps GmbH](https://appshunter.io/developer/1058858931) |

## What reviewers say

### SERSA Zeit

[App page](https://appshunter.io/ios/app/sersa-zeit/id1367885908)

**In-app purchases:** none


### Ortung GBT / CBT

[App page](https://appshunter.io/ios/app/ortung-gbt-cbt/id1504246453)

**In-app purchases:** none


## Frequently asked questions

### Is SERSA Zeit free?

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

### Is Ortung GBT / CBT free?

Ortung GBT / CBT is free to download, with no in-app purchases.

### Do SERSA Zeit or Ortung GBT / CBT have ads?

Neither SERSA Zeit nor Ortung GBT / CBT shows ads.

### Which is updated more often, SERSA Zeit or Ortung GBT / CBT?

SERSA Zeit ships an update every 20 months, and Ortung GBT / CBT every 3 months. Most recently, SERSA Zeit was updated on November 2, 2026 and Ortung GBT / CBT on November 3, 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.*