# Solar PV Exam Revision vs DEA

Solar PV Exam Revision and DEA are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Solar PV Exam Revision ships an update every 5 weeks, DEA every 2 months. The most recent releases landed on October 23, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Solar PV Exam Revision | DEA |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Paid | — |
| Size | 26 MB | 28 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Eknath Kadam](https://appshunter.io/developer/465355268) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### Solar PV Exam Revision

[App page](https://appshunter.io/ios/app/solar-pv-exam-revision/id351685979)

Learn and test your knowledge of over 500 UK road and traffic signs. This app is essential for new drivers preparing for their theory test and beneficial for all road users to enhance safety.

**Highlights:** Study over 500 road signs, Cover flow interface, Quiz yourself, Prepare for theory test, Track progress, Re-attempt incorrect questions

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

**In-app purchases:** none


### DEA

[App page](https://appshunter.io/ios/app/dea-c01-data-engineer-prep/id6747032687)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar PV Exam Revision free?

Solar PV Exam Revision is free to download, with no in-app purchases.

### Is DEA free?

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

### Do Solar PV Exam Revision or DEA have ads?

Neither Solar PV Exam Revision nor DEA shows ads.

### Which is updated more often, Solar PV Exam Revision or DEA?

Solar PV Exam Revision ships an update every 5 weeks, and DEA every 2 months. Most recently, Solar PV Exam Revision was updated on October 23, 2026 and DEA on October 9, 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.*