# ETDI Customer Application vs CertPrep

The clearest difference is in-app purchases: ETDI Customer Application at none against CertPrep's 10. ETDI Customer Application also leads on iOS requirement (10.0 vs 17.0). CertPrep's advantage is update cadence (every 10 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. CertPrep sells 10 one-off in-app purchases. ETDI Customer Application asks for nothing beyond the download.

ETDI Customer Application ships an update every 2 months, CertPrep every 10 days. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ETDI Customer Application | CertPrep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 22 MB | 4 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Emirates Transport](https://appshunter.io/developer/819179894) | [Waltsoft Inc](https://appshunter.io/developer/891505869) |

## What reviewers say

### ETDI Customer Application

[App page](https://appshunter.io/ios/app/etdi-customer-application/id1410083087)

**Features:** macOS Compatibility

**In-app purchases:** none


### CertPrep

[App page](https://appshunter.io/ios/app/certprep-certification-exams/id6759506639)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SC-100 Cybersecurity Arch Pro | $9.99 | one-time |
| SC-300 Identity & Access Pro | $9.99 | one-time |
| AWS DevOps Professional | $9.99 | one-time |
| AWS Security Specialty | $9.99 | one-time |
| AWS Solutions Architect Assoc | $9.99 | one-time |
| AWS Developer Associate | $9.99 | one-time |
| AWS GenAI Professional | $9.99 | one-time |
| AWS Adv Networking | $9.99 | one-time |
| AWS Cloud Practitioner | $9.99 | one-time |
| AWS Data Engineer | $9.99 | one-time |


## Frequently asked questions

### Is ETDI Customer Application free?

ETDI Customer Application is free to download, with no in-app purchases.

### Is CertPrep free?

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

### Do ETDI Customer Application or CertPrep have ads?

Neither ETDI Customer Application nor CertPrep shows ads.

### Which is updated more often, ETDI Customer Application or CertPrep?

ETDI Customer Application ships an update every 2 months, and CertPrep every 10 days. Most recently, ETDI Customer Application was updated on October 6, 2026 and CertPrep on October 8, 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.*