# X2B vs LEHMANN Transponder

X2B and LEHMANN Transponder are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

X2B ships an update every 19 months, LEHMANN Transponder every 10 months. The most recent releases landed on October 13, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | X2B | LEHMANN Transponder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 10 months** |
| Size | 2 MB | 3 MB |
| Requires iOS | **17.5** | 18.6 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [innoEnergy GmbH](https://appshunter.io/developer/1473677176) | [Lehmann Vertriebsges. mbH & Co. KG](https://appshunter.io/developer/980603055) |

## What reviewers say

### X2B

[App page](https://appshunter.io/ios/app/x2b/id1535254096)

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

**In-app purchases:** none


### LEHMANN Transponder

[App page](https://appshunter.io/ios/app/lehmann-transponder/id1637886496)

**In-app purchases:** none


## Frequently asked questions

### Is X2B free?

X2B is free to download, with no in-app purchases.

### Is LEHMANN Transponder free?

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

### Do X2B or LEHMANN Transponder have ads?

Neither X2B nor LEHMANN Transponder shows ads.

### Which is updated more often, X2B or LEHMANN Transponder?

X2B ships an update every 19 months, and LEHMANN Transponder every 10 months. Most recently, X2B was updated on October 13, 2026 and LEHMANN Transponder on October 27, 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.*