# CDL Master vs Peptendium

The clearest difference is in-app purchases: CDL Master at none against Peptendium's 2. CDL Master also leads on update cadence (daily vs monthly). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Peptendium sells 2 in-app purchases, starting at $9.99 per month. CDL Master asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for CDL Master against 5.0 for Peptendium. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

CDL Master ships an update daily, Peptendium monthly. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | CDL Master | Peptendium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/cdl-master-exam-prep/id6761146936/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/peptendium/id6786397444/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Monthly |
| Monetization | **Free** | Freemium |
| Size | 41 MB | 39 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Inspectra Software LLC](https://appshunter.io/developer/1888021658) | [Ocoee Studios LLC](https://appshunter.io/developer/6784049772) |

## What reviewers say

### CDL Master

[App page](https://appshunter.io/ios/app/cdl-master-exam-prep/id6761146936)

Prepare for your commercial driver's license exam with realistic practice tests, detailed pre-trip inspection guides, and maneuver training. This app offers flashcards for key terms and components to help you succeed.

**Highlights:** Practice tests with real CDL-style questions, Pre-trip inspection breakdown, Backing and maneuver training, Flashcards for key terms, Simple and fast interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Peptendium

[App page](https://appshunter.io/ios/app/peptendium/id6786397444)

This app provides an educational platform for understanding peptide science. It features a library of peptide profiles, research summaries, and learning modules to enhance research literacy. It is designed for students and researchers, focusing on educational content rather than medical advice.

**Highlights:** 297 peptide profiles with detailed information, Evidence signal to distinguish research maturity, Curated research briefs and summaries, Daily, weekly, and monthly research snapshots, Structured learning modules and lessons, Library search, filter, and comparison tools, Private notebook for research organization

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peptendium Pro | $9.99 | per month |
| Peptendium Pro | $79.99 | per year |


## Frequently asked questions

### Is CDL Master free?

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

### Is Peptendium free?

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

### Which has better reviews, CDL Master or Peptendium?

CDL Master and Peptendium are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do CDL Master or Peptendium have ads?

Neither CDL Master nor Peptendium shows ads.

### Which is updated more often, CDL Master or Peptendium?

CDL Master ships an update daily, and Peptendium monthly. Most recently, CDL Master was updated on October 9, 2026 and Peptendium 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.*