# IDD / IADS vs JustGo

The clearest difference is update cadence: JustGo at every 2 weeks against IDD / IADS's every 4 months. IDD / IADS's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

IDD / IADS ships an update every 4 months, JustGo every 2 weeks. The most recent releases landed on September 13, 2026 and January 22, 2026 respectively.

## The numbers

| Metric | IDD / IADS | JustGo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 31 MB | 90 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Professional Dive Association Holding B.V.](https://appshunter.io/developer/1673748453) | [Arval, BNP Paribas Group](https://appshunter.io/developer/393536637) |

## What reviewers say

### IDD / IADS

[App page](https://appshunter.io/ios/app/idd-iads/id1673748451)

**Features:** macOS Compatibility

**In-app purchases:** none


### JustGo

[App page](https://appshunter.io/ios/app/justgo/id6480456794)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is IDD / IADS free?

IDD / IADS is free to download, with no in-app purchases.

### Is JustGo free?

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

### Do IDD / IADS or JustGo have ads?

Neither IDD / IADS nor JustGo shows ads.

### Which is updated more often, IDD / IADS or JustGo?

IDD / IADS ships an update every 4 months, and JustGo every 2 weeks. Most recently, IDD / IADS was updated on September 13, 2026 and JustGo on January 22, 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.*