# AdPreviewer vs GraviTrax Power

The clearest difference is rating: AdPreviewer at 5.0 against GraviTrax Power's 3.7. AdPreviewer also leads on review sentiment (100% vs 75%). GraviTrax Power's advantage is ratings volume (6 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

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

AdPreviewer holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews point the same way: 100% of AdPreviewer's written reviews are positive against 75% of GraviTrax Power's.

AdPreviewer ships an update every 14 months, GraviTrax Power every 10 months. The most recent releases landed on October 17, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | AdPreviewer | GraviTrax Power |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/adpreviewer/id949612320/reviews)** | [3.7 (6 ratings)](https://appshunter.io/ios/app/gravitrax-power/id1621684650/reviews) |
| Number of ratings | 2 | **6** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 10 months** |
| Monetization | Free | Free |
| Size | 11 MB | 92 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FreeWheel Media Inc.](https://appshunter.io/developer/949612319) | [Ravensburger Verlag GmbH](https://appshunter.io/developer/1505283467) |

## What reviewers say

### AdPreviewer

[App page](https://appshunter.io/ios/app/adpreviewer/id949612320)

This tool allows users to preview ads rendered by the FreeWheel iOS AdManager. It functions as a player for FreeWheel ad responses, enabling verification of composed or captured ad content.

**Highlights:** Ad playback integration, FreeWheel iOS AdManager support, Preview composed ad responses, Verify captured ad responses, Configurator tool integration

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

**In-app purchases:** none


### GraviTrax Power

[App page](https://appshunter.io/ios/app/gravitrax-power/id1621684650)

Control your marble runs digitally with this app. Connect to POWER components to remotely control, program, and add sound effects to your creations. It offers a playful introduction to programming and enhances marble run gameplay.

**Highlights:** Digital control of marble runs, Programming functions, Remote control capabilities, Integrated stopwatch, Sound effects, Playful introduction to programming

**In-app purchases:** none


## Frequently asked questions

### Is AdPreviewer free?

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

### Is GraviTrax Power free?

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

### Which has better reviews, AdPreviewer or GraviTrax Power?

AdPreviewer is rated higher. AdPreviewer averages 5.0 out of 5 from 2 ratings, while GraviTrax Power averages 3.7 from 6 ratings.

### Do AdPreviewer or GraviTrax Power have ads?

Neither AdPreviewer nor GraviTrax Power shows ads.

### Which is updated more often, AdPreviewer or GraviTrax Power?

AdPreviewer ships an update every 14 months, and GraviTrax Power every 10 months. Most recently, AdPreviewer was updated on October 17, 2026 and GraviTrax Power on October 22, 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.*