Comparison

Pre vs Gyraline

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Pre

This app guides users through pre-alignment tasks using a connected Bluetooth probe. It allows measurement and recording of run-out, bearing clearance, and soft foot, with the ability to generate instant PDF reports.

Highlights
  • Bluetooth connectivity
  • Icon-based adaptive user interface
  • Measure and record Run-Out
  • Measure and record Bearing Clearance
  • Measure and record True SoftCheck
  • Generate instant PDF reports
Features
Read full description

This is a companion app for performing pre-alignment tasks, using the RT-300/AT-10. The app guides the user through the complete pre-alignment process when using the Bluetooth® connected ACOEM Run-Out Probe. This offers a complete pre-alignment package, including the possibility to measure and record Run-Out, Bearing Clearance, and True SoftCheck. The PDF Report function provides a fast on-site reporting capability by converting saved measurement reports into PDF files. ---- Note: This app works with the ACOEM Run-Out Probe ---- Key Features: - Connected using Bluetooth® - GuideU: Our patented icon-based and color-coded adaptive user interface - Measure and record Run-Out, Bearing Clearance and True SoftCheck. - True SoftCheck - soft foot measurements directly on the feet of the machine. - Create an instant PDF-report Visit the website www.acoem.com for more information on alignment in general, the ACOEM tools and support of the app.

About

Gyraline

This app transforms your smartphone and a specialized toolkit into a professional-grade wheel alignment system. It enables fast, accurate 4-wheel alignments for enthusiasts and DIYers in their own garage, offering precise measurements for various alignment angles.

Highlights
  • Precision 4-wheel alignment
  • Measure total toe (front & rear)
  • Thrust line comparison
  • Camber measurement and adjustment
  • Caster sweep
  • Ackermann visualization
Features
Read full description

Precision 4-Wheel Alignment, Reimagined Gyraline is a revolutionary, patent-pending alignment system that turns your smartphone and our precision toolkit into a professional-grade wheel alignment machine. Perform the fastest, most accurate 4-wheel alignment you’ve ever done, right in your own garage. Measure Like a Pro • Total Toe (Front & Rear): Instantly measure total toe across both axles. • Thrust Line Comparison: Verify front toe alignment relative to the rear axle’s thrust line. • Body Centerline Alignment: Check toe against the vehicle’s geometric centerline. • Camber Mode: Measure and adjust camber with live digital precision. • Caster Mode: Sweep caster accurately, without expensive shop hardware. • Ackermann Mode: Visualize steering geometry like never before. Why Gyraline Gyraline brings professional alignment accuracy to enthusiasts, racers, and commuters without the need for bulky alignment racks. Fast setup, clear visuals, and uncompromising precision all powered by your phone.

Screenshots

Pre4 screens
Gyraline4 screens

Verdict

The call

The clearest difference is rating: Pre at 5.0 against Gyraline's 3.8. Pre also leads on in-app purchases (none vs 9) and iOS requirement (13.0 vs 15.0). Gyraline's advantage is update cadence (fortnightly vs every 7 months) and ratings volume (99 vs 1). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Gyraline sells 9 in-app purchases, starting at $7.99 per 7 days. Pre asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Pre holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Gyraline has 99 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Pre ships an update every 7 months, Gyraline fortnightly. The most recent releases landed on September 28, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
Pre versus Gyraline: the parameters behind the verdict, then further details
ParameterPreGyraline
PriceFreeFree
Rating5.0 (1 ratings) — better3.8 (99 ratings)
Positive reviews—60.7% of reviews
Number of ratings199 — better
Update frequencyEvery 7 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size67 MB63 MB
Age rating4+4+
DeveloperACOEM GroupMechly LLC

Customer experience

Pre

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Gyraline

All ratings99 ratings
Positive67.7%
Neutral5.1%
Negative27.3%
Written reviews84 reviews
Positive60.7%
Neutral7.1%
Negative32.1%

Bugs and requests

Pre

Not enough reviews yet to summarise bugs or requests.

Gyraline

Reported bugs

16 issues
  • Inconsistent measurements
  • App crashes
  • Sensor axis reversed (G2)
  • Accuracy defaults revert to 0.10°
  • Camber tool unreliable
Show 11 more
  • Manual/videos do not match current app design
  • Front toe readings inaccurate after update
  • Body align function removed for G1
  • Surface profile percentage not visible
  • Buggy app renders G2 unusable
  • Previous update was better, new update makes it impossible to get accurate results
  • G1 owners don't get vehicle spec access
  • Body alignment of front toe removed
  • Front toe readings inaccurate
  • App requires refresh with red screen when moving to front wheel
  • Inconsistent readings even after adjustments

Requested features

7 requests
  • 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
Show 2 more
  • Update tutorials to match current app version
  • Dark mode text display fix

In-app purchases

None

Pre

No in-app purchases

9 purchases

Gyraline

Subscriptions3
  • Gyraline DIY One Week3 Days trial$7.997 Days
  • Gyraline DIY One Month$9.991 Month
  • Quick Check Single Device1 Month trial$99.991 Month
One-time6
  • TrialFree
  • Single Token Purchase$0.99
  • Five Token Purchase$3.99
Show 3 more
  • Weekend Pass$5.99
  • One Time Subscription$69.99
  • Gyraline Pro$399.99

Questions

Is Pre free?
Pre is free to download, with no in-app purchases.
Is Gyraline free?
Gyraline is free to download, with in-app purchases available.
Which has better reviews, Pre or Gyraline?
Pre is rated higher. Pre averages 5.0 out of 5 from 1 ratings, while Gyraline averages 3.8 from 99 ratings.
Do Pre or Gyraline have ads?
Neither Pre nor Gyraline shows ads.
Which is updated more often, Pre or Gyraline?
Pre ships an update every 7 months, and Gyraline fortnightly. Most recently, Pre was updated on September 28, 2026 and Gyraline on October 15, 2026.

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