# DUOBUS vs FLEXITAC

The clearest difference is update cadence: FLEXITAC at every 4 weeks against DUOBUS's every 7 months. DUOBUS's advantage is iOS requirement (13.0 vs 15.1). 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.

DUOBUS ships an update every 7 months, FLEXITAC every 4 weeks. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | DUOBUS | FLEXITAC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 weeks** |
| Size | 26 MB | 56 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Keolis Haut-Bugey, acteur du réseau DUOBUS](https://appshunter.io/developer/1821691142) | [Spare Labs Inc.](https://appshunter.io/developer/1073027185) |

## What reviewers say

### DUOBUS

[App page](https://appshunter.io/ios/app/duobus/id6747510110)

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

**In-app purchases:** none


### FLEXITAC

[App page](https://appshunter.io/ios/app/flexitac/id6756326779)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is DUOBUS free?

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

### Is FLEXITAC free?

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

### Do DUOBUS or FLEXITAC have ads?

Neither DUOBUS nor FLEXITAC shows ads.

### Which is updated more often, DUOBUS or FLEXITAC?

DUOBUS ships an update every 7 months, and FLEXITAC every 4 weeks. Most recently, DUOBUS was updated on November 8, 2026 and FLEXITAC on November 5, 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.*