# Alstom DBB vs ACER Tech

The clearest difference is update cadence: Alstom DBB at every 5 weeks against ACER Tech's every 5 months. ACER Tech's advantage is iOS requirement (15.6 vs 17.0). 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.

Alstom DBB ships an update every 5 weeks, ACER Tech every 5 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Alstom DBB | ACER Tech |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Size | 40 MB | 47 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alstom Group](https://appshunter.io/developer/1352713641) | [Tor.ai Limited](https://appshunter.io/developer/1288507527) |

## What reviewers say

### Alstom DBB

[App page](https://appshunter.io/ios/app/alstom-dbb/id1469890870)

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

**In-app purchases:** none


### ACER Tech

[App page](https://appshunter.io/ios/app/acer-tech/id6654921315)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Alstom DBB free?

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

### Is ACER Tech free?

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

### Do Alstom DBB or ACER Tech have ads?

Neither Alstom DBB nor ACER Tech shows ads.

### Which is updated more often, Alstom DBB or ACER Tech?

Alstom DBB ships an update every 5 weeks, and ACER Tech every 5 months. Most recently, Alstom DBB was updated on October 26, 2026 and ACER Tech on October 25, 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.*