# Dyna vs my9xx

The clearest difference is review sentiment: my9xx at 100% against Dyna's 0%. my9xx also leads on update cadence (every 2 weeks vs every 19 months). Dyna's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, in-app purchases and device support there is nothing between them.

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

Dyna ships an update every 19 months, my9xx every 2 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Dyna | my9xx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/dyna-drill-power-sections/id1312988826/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 19 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 26 MB | 51 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Schlumberger Technology Corporation](https://appshunter.io/developer/380098290) | [Digital Market Services GmbH](https://appshunter.io/developer/1608885010) |

## What reviewers say

### Dyna

[App page](https://appshunter.io/ios/app/dyna-drill-power-sections/id1312988826)

Explore and search detailed specifications for motor power sections, rotors, and stators. Find the ideal drilling solution by filtering based on tool size, lobes, stages, and revolutions per gallon. Save favorites and connect with experts.

**Highlights:** Browse power section spec sheets, Search by tool size, lobes, stages, and RPM, Identify optimal drilling solutions, Save commonly used spec sheets, Connect with regional experts

**Features:** macOS Compatibility

**In-app purchases:** none


### my9xx

[App page](https://appshunter.io/ios/app/my9xx/id1608885008)

This app aggregates Porsche 911 listings from multiple countries and platforms, allowing users to search, analyze, compare, and find their desired vehicle. It provides market insights to aid in confident purchasing decisions.

**Highlights:** Search across multiple marketplaces, Analyze car listings, Compare with market data, Contact sellers directly, Market insights for buying decisions

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Dyna free?

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

### Is my9xx free?

my9xx is free to download, with no in-app purchases.

### Do Dyna or my9xx have ads?

my9xx shows ads; Dyna does not.

### Which is updated more often, Dyna or my9xx?

Dyna ships an update every 19 months, and my9xx every 2 weeks. Most recently, Dyna was updated on November 2, 2026 and my9xx on November 3, 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.*