# Welding Inspector CWI Prep vs API Inspector Cert Prep

The clearest difference is iOS requirement: Welding Inspector CWI Prep at 13.0 against API Inspector Cert Prep's 15.1. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Welding Inspector CWI Prep sells 4 in-app purchases, starting at $6.99 per 7 days and API Inspector Cert Prep sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Welding Inspector CWI Prep | API Inspector Cert Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 months |
| Size | 25 MB | 32 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [fly sky pty ltd](https://appshunter.io/developer/1838696534) | [Simon Shih](https://appshunter.io/developer/1870707682) |

## What reviewers say

### Welding Inspector CWI Prep

[App page](https://appshunter.io/ios/app/welding-inspector-cwi-prep/id6778984074)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Welding CWI Weekly | $6.99 | per 7 days |
| Welding CWI Monthly | $16.99 | per month |
| Welding CWI Yearly | $39.99 | per year |
| Welding CWI Lifetime | $79.99 | one-time |


### API Inspector Cert Prep

[App page](https://appshunter.io/ios/app/api-inspector-cert-prep/id6785875538)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| API 510 – Pressure Vessel Inspector | $19.99 | one-time |
| API 570 – Piping Inspector | $19.99 | one-time |
| API 653 – Storage Tank Inspector | $19.99 | one-time |


## Frequently asked questions

### Is Welding Inspector CWI Prep free?

Welding Inspector CWI Prep is free to download, with in-app purchases available.

### Is API Inspector Cert Prep free?

API Inspector Cert Prep is free to download, with in-app purchases available.

### Do Welding Inspector CWI Prep or API Inspector Cert Prep have ads?

Neither Welding Inspector CWI Prep nor API Inspector Cert Prep shows ads.

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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.*