# PreVer vs OpoTrain

The clearest difference is in-app purchases: PreVer at none against OpoTrain's 10. PreVer also leads on iOS requirement (9.0 vs 11.0). OpoTrain's advantage is update cadence (every 6 months vs every 34 months). On price, ads and device support there is nothing between them.

Both are free to download. OpoTrain sells 6 in-app purchases, starting at $3.99 per month. PreVer asks for nothing beyond the download.

PreVer ships an update every 34 months, OpoTrain every 6 months. The most recent releases landed on October 17, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | PreVer | OpoTrain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 6 months** |
| Size | 56 MB | 19 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Universidad de Las Palmas de Gran Canaria](https://appshunter.io/developer/719417784) | [Naranco Brands](https://appshunter.io/developer/1740514007) |

## What reviewers say

### PreVer

[App page](https://appshunter.io/ios/app/prever-ulpgc/id1597991162)

**In-app purchases:** none


### OpoTrain

[App page](https://appshunter.io/ios/app/opotrain/id6484269070)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Suscripción Mensual | $3.99 | per month |
| Suscripción Mensual OpoTrain | $3.99 | per month |
| Subscripción Mensual | $3.99 | per month |
| Suscripción Semestral | $22.95 | per 6 months |
| Suscripción Semestral OpoTrain | $22.95 | per 6 months |
| Subscripción Semestral | $22.95 | per 6 months |


## Frequently asked questions

### Is PreVer free?

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

### Is OpoTrain free?

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

### Do PreVer or OpoTrain have ads?

Neither PreVer nor OpoTrain shows ads.

### Which is updated more often, PreVer or OpoTrain?

PreVer ships an update every 34 months, and OpoTrain every 6 months. Most recently, PreVer was updated on October 17, 2026 and OpoTrain on September 23, 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.*