# Tire Calculator (Offset&Speed) vs 割合計算機

The clearest difference is price: 割合計算機 at Free against Tire Calculator (Offset&Speed)'s $1.99. 割合計算機 also leads on update cadence (every 2 months vs every 4 months) and iOS requirement (16.4 vs 26.0). Tire Calculator (Offset&Speed)'s advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

割合計算機 is free to download; Tire Calculator (Offset&Speed) costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Tire Calculator (Offset&Speed) ships an update every 4 months, 割合計算機 every 2 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Tire Calculator (Offset&Speed) | 割合計算機 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tire-calculator-offset-and-speed/id1204309537/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 9 MB | 5 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Satoshi Mori](https://appshunter.io/developer/1204309536) | [Risako Asai](https://appshunter.io/developer/1671273580) |

## What reviewers say

### Tire Calculator (Offset&Speed)

[App page](https://appshunter.io/ios/app/tire-calculator-offset-and-speed/id1204309537)

Easily calculate wheel offset and speedometer errors after tire changes. This tool helps determine changes in rim position, tread width, and actual speed versus displayed speed. It also offers GPS-based speedometer error measurement.

**Highlights:** Wheel offset calculation, Speedometer error calculation, GPS speedometer error measurement, Rim position change calculation, Tread width change calculation, Actual speed vs. meter display

**Features:** macOS Compatibility

**In-app purchases:** none


### 割合計算機

[App page](https://appshunter.io/ios/app/id6477940610)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tire Calculator (Offset&Speed) free?

Tire Calculator (Offset&Speed) costs $1.99, with no in-app purchases.

### Is 割合計算機 free?

割合計算機 is free to download, with no in-app purchases.

### Do Tire Calculator (Offset&Speed) or 割合計算機 have ads?

割合計算機 shows ads; Tire Calculator (Offset&Speed) does not.

### Which is updated more often, Tire Calculator (Offset&Speed) or 割合計算機?

Tire Calculator (Offset&Speed) ships an update every 4 months, and 割合計算機 every 2 months. Most recently, Tire Calculator (Offset&Speed) was updated on November 6, 2026 and 割合計算機 on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*