# QueryQuest vs GCP Data Engineer Exam Prep

The clearest difference is update cadence: GCP Data Engineer Exam Prep at every 10 days against QueryQuest's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. QueryQuest sells 7 one-off in-app purchases and GCP Data Engineer Exam Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

QueryQuest ships an update every 6 months, GCP Data Engineer Exam Prep every 10 days. The most recent releases landed on September 30, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | QueryQuest | GCP Data Engineer Exam Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 10 days** |
| Size | 64 MB | 99 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Zheng Pan Lim](https://appshunter.io/developer/1872604492) | [CHOI SEONGMIN](https://appshunter.io/developer/6772332527) |

## What reviewers say

### QueryQuest

[App page](https://appshunter.io/ios/app/queryquest-learn-sql/id6759665201)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Level 3: SQL Joins | $1.99 | one-time |
| Level 4: Advanced SQL | $1.99 | one-time |
| Level 5: SQL Logic | $2.99 | one-time |
| Level 6: SQL Tools | $2.99 | one-time |
| Level 7: Stellar Challenges | $2.99 | one-time |
| Level 8: Interview Prep | $2.99 | one-time |
| QueryQuest PRO: Unlock Everything | $9.99 | one-time |


### GCP Data Engineer Exam Prep

[App page](https://appshunter.io/ios/app/gcp-data-engineer-exam-prep/id6785744308)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $4.90 | one-time |


## Frequently asked questions

### Is QueryQuest free?

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

### Is GCP Data Engineer Exam Prep free?

GCP Data Engineer Exam Prep is free to download, with in-app purchases available.

### Do QueryQuest or GCP Data Engineer Exam Prep have ads?

Neither QueryQuest nor GCP Data Engineer Exam Prep shows ads.

### Which is updated more often, QueryQuest or GCP Data Engineer Exam Prep?

QueryQuest ships an update every 6 months, and GCP Data Engineer Exam Prep every 10 days. Most recently, QueryQuest was updated on September 30, 2026 and GCP Data Engineer Exam Prep on September 20, 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.*