MultiSync vs Gyraline
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MultiSync
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Michelin MultiSync is about leveraging all the potential of Michelin connected tires. The free version of the app lets you: - Check your vehicle tires’ pressure and temperature (including its spares if any), through the display of immediate values received in Bluetooth by your smartphone. - Share your vehicle with others, in case you're not the only one driving it. Subscription plans are also available to: - Remotely access to last pressure and temperature measurements gathered by any other user of MultiSync in your vicinity. - Be warned if your vehicle tires’ pressure (including its spares if any) is too low or leaking. - Display your vehicle tires’ pressure and temperature in a time-series fashion. - Get lap time measurement in sport track usage conditions. https://iot.michelin.com/documents/MultiSync%20Terms%20of%20use.html
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.
- Precision 4-wheel alignment
- Measure total toe (front & rear)
- Thrust line comparison
- Camber measurement and adjustment
- Caster sweep
- Ackermann visualization
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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
Verdict
The clearest difference is update cadence: Gyraline at fortnightly against MultiSync's every 6 weeks. Gyraline also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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
Both are free to download. MultiSync sells 4 in-app purchases, starting at $2.99 per month and Gyraline sells 9 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.
MultiSync ships an update every 6 weeks, Gyraline fortnightly. The most recent releases landed on August 17, 2026 and September 18, 2026 respectively.
| Parameter | MultiSync | Gyraline |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.8 (99 ratings) — better |
| Positive reviews | — | 61.4% of reviews |
| Number of ratings | — | 99 — better |
| Update frequency | Every 6 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Paid |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 69 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Michelin | Mechly LLC |
Bugs and requests
MultiSync
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 moreShow fewer
- 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 moreShow fewer
- Update tutorials to match current app version
- Dark mode text display fix
In-app purchases
MultiSync
- Pressure Monitoring - Monthly$2.991 Month
- My Tire Engineer - Monthly2 Months trial$3.991 Month
- Pressure Monitoring - Yearly$29.991 Year
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- My Tire Engineer - Yearly2 Months trial$44.991 Year
Gyraline
- 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
- TrialFree
- Single Token Purchase$0.99
- Five Token Purchase$3.99
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- Weekend Pass$5.99
- One Time Subscription$69.99
- Gyraline Pro$399.99








