Codelet vs Professional Data Engineer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Codelet
Prepare for technical interviews by identifying core coding patterns and analyzing your performance. Practice coding questions conveniently to improve your skills and pinpoint areas for growth.
- Identify core patterns
- Analyze approaches
- Track performance
- Identify improvement areas
- Practice coding questions
- Anytime, anywhere practice
Read full descriptionHide full description
∙ Identify and analyze the core patterns and approaches ∙ View how well you’re doing and where you can improve ∙ Practice coding questions anywhere and anytime
Professional Data Engineer
Read full descriptionHide full description
Non-Affiliation Disclaimer (Google Professional Data Engineer) This app is an independent exam preparation resource and is not affiliated with, endorsed by, or connected with Google or Google Cloud. All practice materials are created solely for learning and study purposes. Trademark Notice (Google Professional Data Engineer) Google, Google Cloud, and Google Cloud Professional Data Engineer are trademarks or registered trademarks of Google LLC. Any references to Google Cloud exams or terminology are for identification only and do not imply official endorsement. ===== There are many questions on the web that are either outdated or wrongly answered. I am trying here to filter all those questions and provide you with a nice tool to practice the exam similar to the real-life exam as much as possible. This small app was designed with love to help you 5 things: 1. question content is updated monthly in 2026, so you don’t have to worry that these question is outdated anymore. 2. With 2 EXACT-FILTERING features, you can focus easily on questions you are making mistakes or missing. 3. Save difficult questions offline. So you can practice them later when you have free time. 4. Examination mode will help you take test like a real exam. So you will be more confident. 5. NEARLY-100% questions are packed with straightforward explanations. You will know why it is correct or wrong. No more confusing. In sum, this app is simple and straight-to-the-point like description you are reading. Have fun and enjoy the app!
Screenshots
Verdict
The clearest difference is in-app purchases: Codelet at none against Professional Data Engineer's 1. Codelet also leads on update cadence (every 2 months vs every 13 months). Professional Data Engineer's advantage is iOS requirement (10.0 vs 13.4). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Professional Data Engineer sells 1 one-off in-app purchase. Codelet asks for nothing beyond the download.
Codelet ships an update every 2 months, Professional Data Engineer every 13 months. The most recent releases landed on October 6, 2026 and September 21, 2026 respectively.
| Parameter | Codelet | Professional Data Engineer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (127 ratings) — better | — |
| Positive reviews | 53.3% of reviews | — |
| Number of ratings | 127 — better | — |
| Update frequency | Every 2 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.4 | 10.0 — better |
| Further details — not scored | ||
| Size | 25 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Codelet LLC | Trieu Tran |
In-app purchases
Codelet
No in-app purchases
Professional Data Engineer
- Unlock complete App$9.99
Questions
Is Codelet free?
Is Professional Data Engineer free?
Do Codelet or Professional Data Engineer have ads?
Which is updated more often, Codelet or Professional Data Engineer?
Other comparisons
