# XFR vs TRASOL

The clearest difference is rating: XFR at 4.6 against TRASOL's 4.0. XFR also leads on in-app purchases (none vs 1) and ratings volume (824 vs 40). TRASOL's advantage is update cadence (every 10 months vs every 35 months) and review sentiment (52% vs 43%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. TRASOL sells 1 one-off in-app purchase. XFR asks for nothing beyond the download.

XFR holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: XFR has 824 ratings behind it against 40, so its average is the more settled of the two. Written reviews complicate that: 43% of XFR's written reviews are positive against 52% of TRASOL's, so the app with the better star average is not the one people write more warmly about.

XFR ships an update every 35 months, TRASOL every 10 months. The most recent releases landed on September 19, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | XFR | TRASOL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (824 ratings)](https://appshunter.io/ios/app/xfr/id961237904/reviews)** | [4.0 (40 ratings)](https://appshunter.io/ios/app/trasol/id1015112834/reviews) |
| Number of ratings | **824** | 40 |
| Positive reviews | 43.3% of reviews | **52.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 10 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 11 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Nielsen-Kellerman Co.](https://appshunter.io/developer/698732840) | [Desert Tech](https://appshunter.io/developer/1015112833) |

## What reviewers say

### XFR

[App page](https://appshunter.io/ios/app/xfr/id961237904)

Connect your Magnetospeed chronograph to your iOS device to manage velocity data. Organize multiple data series, email results, or back them up with iCloud.  Adjust device settings and clear data directly from your phone.

**Highlights:** Transfer velocity data, Manage multiple data series, Email data, iCloud backup, Clear device data, Adjust device settings

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to set up
- 🚀 Convenient without needing to call a cold range
- 👍 Handy app for storing and tracking data
- 👍 Great app, very simple and straightforward
- 👍 Works great, company has great customer service

**What reviewers complain about**

- 🐛 Does not work with newer iPhone models
- 🐛 Unreliable connection between device and app
- 🐛 Clumsy and frustrating to use
- 🐛 Nagging for reviews
- 🐛 Inconsistent and unreliable readings

**Reported bugs**

- Won't sync to iPhone
- Doesn't work on iPhone 7, iPhone X, iPhone 14 Pro Max
- Delayed syncing, have to unplug and plug back in iPhone

**Requested features**

- Ability to separate load data from one continuous session
- More useful database features like Chronolog or Caldwell apps
- User-adjustable color scheme
- Active syncing between iPhone and iPad
- iCloud syncing for data access across devices


### TRASOL

[App page](https://appshunter.io/ios/app/trasol/id1015112834)

This advanced ballistic calculator provides real-time environmental data and trajectory predictions for precision shooting. It features a heads-up display for automatic target solutions, moving target tracking, and shot logging capabilities.

**Highlights:** Real-time sensor integration, Heads-up display (HUD), Moving target tracking, Unlimited equipment profiles, Cloud backup/sync, Long-range accuracy up to 5000 yards, Scope turret calibration

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full TRASOL Upgrade | $39.99 | one-time |


## Frequently asked questions

### Is XFR free?

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

### Is TRASOL free?

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

### Which has better reviews, XFR or TRASOL?

XFR is rated higher. XFR averages 4.6 out of 5 from 824 ratings, while TRASOL averages 4.0 from 40 ratings.

### Do XFR or TRASOL have ads?

Neither XFR nor TRASOL shows ads.

### Which is updated more often, XFR or TRASOL?

XFR ships an update every 35 months, and TRASOL every 10 months. Most recently, XFR was updated on September 19, 2026 and TRASOL on September 28, 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.*