# Solar PV Exam Revision vs Study Harbors

The clearest difference is price: Solar PV Exam Revision at Free against Study Harbors's $0.99. Study Harbors's advantage is in-app purchases (none vs 4) and update cadence (fortnightly vs every 5 weeks). On ads, device support and iOS requirement there is nothing between them.

Solar PV Exam Revision is free to download; Study Harbors costs $0.99 up front. Solar PV Exam Revision sells 4 in-app purchases, starting at $9.99 per month. Study Harbors asks for nothing beyond the download.

Solar PV Exam Revision ships an update every 5 weeks, Study Harbors fortnightly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Solar PV Exam Revision | Study Harbors |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Paid | — |
| Size | 26 MB | 5 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eknath Kadam](https://appshunter.io/developer/465355268) | [Robert Corbin](https://appshunter.io/developer/1890247992) |

## 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 (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Quarterly | $19.99 | per 3 months |
| 6 Months | $24.99 | per 6 months |
| Yearly | $39.99 | per year |


### Study Harbors

[App page](https://appshunter.io/ios/app/study-harbors/id6770024866)

**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 in-app purchases available.

### Is Study Harbors free?

Study Harbors costs $0.99, with no in-app purchases.

### Do Solar PV Exam Revision or Study Harbors have ads?

Neither Solar PV Exam Revision nor Study Harbors shows ads.

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

Solar PV Exam Revision ships an update every 5 weeks, and Study Harbors fortnightly. Most recently, Solar PV Exam Revision was updated on November 6, 2026 and Study Harbors on November 5, 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.*