# CHRONO Flex vs QR Safe

The clearest difference is in-app purchases: CHRONO Flex at none against QR Safe's 1. QR Safe's advantage is update cadence (every 4 days vs every 5 weeks) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. QR Safe sells 1 one-off in-app purchase. CHRONO Flex asks for nothing beyond the download.

CHRONO Flex ships an update every 5 weeks, QR Safe every 4 days. The most recent releases landed on October 4, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | CHRONO Flex | QR Safe |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Size | 16 MB | 41 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHRONO Flex](https://appshunter.io/developer/909331288) | [Eric FONTENY](https://appshunter.io/developer/1885318988) |

## What reviewers say

### CHRONO Flex

[App page](https://appshunter.io/ios/app/chrono-flex/id6692622370)

**In-app purchases:** none


### QR Safe

[App page](https://appshunter.io/ios/app/qr-safe-qr-code-scanner/id6760611848)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QR Safe Premium | $2.99 | one-time |


## Frequently asked questions

### Is CHRONO Flex free?

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

### Is QR Safe free?

QR Safe is free to download, with in-app purchases available.

### Do CHRONO Flex or QR Safe have ads?

Neither CHRONO Flex nor QR Safe shows ads.

### Which is updated more often, CHRONO Flex or QR Safe?

CHRONO Flex ships an update every 5 weeks, and QR Safe every 4 days. Most recently, CHRONO Flex was updated on October 4, 2026 and QR Safe on October 1, 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.*