# U vs Gyraline

The clearest difference is review sentiment: Gyraline at 60% against U's 0%. Gyraline also leads on rating (3.8 vs 3.0) and update cadence (fortnightly vs every 11 months). U's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Gyraline holds the better App Store score, 3.8 against 3.0. That said, the two scores are not equally well evidenced: Gyraline has 104 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of U's written reviews are positive against 60% of Gyraline's.

U ships an update every 11 months, Gyraline fortnightly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | U | Gyraline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/u-wavepak-bm/id1503266464/reviews) | **[3.8 (104 ratings)](https://appshunter.io/ios/app/gyraline/id6450752768/reviews)** |
| Number of ratings | 2 | **104** |
| Positive reviews | 0.0% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 13 MB | 63 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MITUTOYO CORPORATION](https://appshunter.io/developer/1503266463) | [Mechly LLC](https://appshunter.io/developer/1694760852) |

## What reviewers say

### U

[App page](https://appshunter.io/ios/app/u-wavepak-bm/id1503266464)

Streamline your workflow by directly inputting measurements from calipers and micrometers. This application simplifies data collection for process control, making it easier to manage your measurements.

**Highlights:** Direct caliper data input, Direct micrometer data input, Process control functionality, Easy data collection

**Features:** macOS Compatibility

**In-app purchases:** none


### Gyraline

[App page](https://appshunter.io/ios/app/gyraline/id6450752768)

This app transforms your smartphone and a precision toolkit into a professional-grade wheel alignment machine. It offers fast, accurate measurements for total toe, camber, caster, and more, right in your garage. Ideal for enthusiasts and DIYers seeking precise vehicle alignment.

**Highlights:** Precision 4-wheel alignment, Measure total toe (front & rear), Thrust line comparison, Body centerline alignment, Camber, caster, and Ackermann modes, Live digital precision measurements

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great for DIY alignments
- 💰 Saves money on professional alignments
- 🚀 Quick and easy adjustments
- 🎯 Surprisingly accurate results
- 💡 Innovative tool for automotive enthusiasts

**What reviewers complain about**

- 🐛 Inconsistent measurements
- 🤔 Steep learning curve
- ⏳ Time-consuming process
- 🤷‍♂️ Confusing interface/instructions
- 🐛 App crashes/bugs

**Reported bugs**

- Inconsistent measurements
- App crashes
- Sensor axis reversed (G2)
- Accuracy defaults revert to 0.10°
- Camber tool unreliable

**Requested features**

- Add caster to features
- Live measurements via Bluetooth sensors
- Separate toe-only section for quicker adjustments
- Self-calibration setting
- Vehicle spec database for G1 owners


## Frequently asked questions

### Is U free?

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

### Is Gyraline free?

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

### Which has better reviews, U or Gyraline?

Gyraline is rated higher. U averages 3.0 out of 5 from 2 ratings, while Gyraline averages 3.8 from 104 ratings.

### Do U or Gyraline have ads?

Neither U nor Gyraline shows ads.

### Which is updated more often, U or Gyraline?

U ships an update every 11 months, and Gyraline fortnightly. Most recently, U was updated on November 3, 2026 and Gyraline on November 7, 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.*