# SHv4 Calculator vs Motool Service Assistant

The clearest difference is rating: SHv4 Calculator at 5.0 against Motool Service Assistant's 3.3. SHv4 Calculator also leads on review sentiment (67% vs 32%) and in-app purchases (none vs 2). Motool Service Assistant's advantage is update cadence (every 8 days vs every 3 months) and ratings volume (24 vs 4). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Motool Service Assistant sells 2 in-app purchases, starting at $0.99 per month. SHv4 Calculator asks for nothing beyond the download.

SHv4 Calculator holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Motool Service Assistant has 24 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 67% of SHv4 Calculator's written reviews are positive against 32% of Motool Service Assistant's.

SHv4 Calculator ships an update every 3 months, Motool Service Assistant every 8 days. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | SHv4 Calculator | Motool Service Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/shv4-calculator/id979817071/reviews)** | [3.3 (24 ratings)](https://appshunter.io/ios/app/motool-service-assistant/id1444719113/reviews) |
| Number of ratings | 4 | **24** |
| Positive reviews | **66.7% of reviews** | 31.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 233 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HealTech Electronics Ltd.](https://appshunter.io/developer/979817070) | [Motool Inc](https://appshunter.io/developer/1444719112) |

## What reviewers say

### SHv4 Calculator

[App page](https://appshunter.io/ios/app/shv4-calculator/id979817071)

Calculate your vehicle's speedometer error and get setup instructions for a SpeedoHealer module. This free, ad-free tool helps correct inaccurate speed and odometer readings on most motorcycles and some cars. It offers troubleshooting information and is compatible with non-cable driven speedometers.

**Highlights:** Calculate speedometer error, Generate SpeedoHealer v4 setup instructions, Access troubleshooting information, Ad-free experience, Offline functionality, Compatible with most motorcycles and cars

**In-app purchases:** none


### Motool Service Assistant

[App page](https://appshunter.io/ios/app/motool-service-assistant/id1444719113)

This app helps motorcycle and mountain bike owners track maintenance tasks, log suspension settings, and record ride notes. It offers reminders for upcoming services and supports managing multiple bikes. An optional subscription unlocks advanced features and a virtual remote display.

**Highlights:** Service task tracking, Suspension setting logs, Ride notes documentation, Service interval reminders, Unlimited bike management, Virtual remote display

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Service Assistant | $0.99 | per month |
| Service Assistant | $9.99 | per year |


## Frequently asked questions

### Is SHv4 Calculator free?

SHv4 Calculator is free to download, with no in-app purchases.

### Is Motool Service Assistant free?

Motool Service Assistant is free to download, with in-app purchases available.

### Which has better reviews, SHv4 Calculator or Motool Service Assistant?

SHv4 Calculator is rated higher. SHv4 Calculator averages 5.0 out of 5 from 4 ratings, while Motool Service Assistant averages 3.3 from 24 ratings.

### Do SHv4 Calculator or Motool Service Assistant have ads?

Neither SHv4 Calculator nor Motool Service Assistant shows ads.

### Which is updated more often, SHv4 Calculator or Motool Service Assistant?

SHv4 Calculator ships an update every 3 months, and Motool Service Assistant every 8 days. Most recently, SHv4 Calculator was updated on November 1, 2026 and Motool Service Assistant on November 2, 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.*