# PDRA Slips vs TrackR Performance

The clearest difference is in-app purchases: TrackR Performance at none against PDRA Slips's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PDRA Slips sells 2 in-app purchases, starting at $4.99 per month. TrackR Performance asks for nothing beyond the download.

PDRA Slips ships an update fortnightly, TrackR Performance every 3 weeks. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PDRA Slips | TrackR Performance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/pdra-slips/id1514065396/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 38 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stephan Monette](https://appshunter.io/developer/1299469285) | [Dana Leonard](https://appshunter.io/developer/6785265676) |

## What reviewers say

### PDRA Slips

[App page](https://appshunter.io/ios/app/pdra-slips/id1514065396)

Access detailed drag racing time slips from PDRA events directly on your phone. Enhance your race day experience with real-time weather data and automatic density altitude calculations to help tune your engine and strategize your dial-in.

**Highlights:** Real-time time slip data, Weather station information, Automatic density altitude calculation, Engine tuning assistance, Dial-in calculation for bracket racing, Review qualification, pairing, and ladder reports

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDRA Sharing Access | $4.99 | per month |
| Annual Premium Access | $8.99 | per year |


### TrackR Performance

[App page](https://appshunter.io/ios/app/trackr-performance/id6785265674)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDRA Slips free?

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

### Is TrackR Performance free?

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

### Do PDRA Slips or TrackR Performance have ads?

Neither PDRA Slips nor TrackR Performance shows ads.

### Which is updated more often, PDRA Slips or TrackR Performance?

PDRA Slips ships an update fortnightly, and TrackR Performance every 3 weeks. Most recently, PDRA Slips was updated on October 14, 2026 and TrackR Performance on October 15, 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.*