# Dyo vs CheckChantier

The clearest difference is update cadence: Dyo at every 8 days against CheckChantier's every 6 weeks. CheckChantier's advantage is iOS requirement (15.5 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.

Dyo ships an update every 8 days, CheckChantier every 6 weeks. The most recent releases landed on September 16, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Dyo | CheckChantier |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 6 weeks |
| Monetization | Free | — |
| Size | 66 MB | 83 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SYMALEAN](https://appshunter.io/developer/1267318606) | [ORGANIS PROF PREVENTION BTP](https://appshunter.io/developer/953513116) |

## What reviewers say

### Dyo

[App page](https://appshunter.io/ios/app/dyo/id1487836170)

Streamline your QHSE, RSE, energy, and information security management systems in one app. Empower your field teams with offline access to crucial data, enabling real-time incident reporting, audits, and document visualization.

**Highlights:** QHSE and RSE system management, Offline field access, Real-time incident reporting, Audit report generation, Non-conformity declaration, Document visualization

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

**In-app purchases:** none


### CheckChantier

[App page](https://appshunter.io/ios/app/checkchantier/id6443410774)

**In-app purchases:** none


## Frequently asked questions

### Is Dyo free?

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

### Is CheckChantier free?

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

### Do Dyo or CheckChantier have ads?

Neither Dyo nor CheckChantier shows ads.

### Which is updated more often, Dyo or CheckChantier?

Dyo ships an update every 8 days, and CheckChantier every 6 weeks. Most recently, Dyo was updated on September 16, 2026 and CheckChantier on September 21, 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.*