# SPC Tools vs 関数電卓

The clearest difference is in-app purchases: 関数電卓 at none against SPC Tools's 2. SPC Tools's advantage is update cadence (every 3 days vs monthly) and iOS requirement (17.0 vs 26.5). On price, ads and device support there is nothing between them.

Both are free to download. SPC Tools sells 2 in-app purchases, starting at $2.99 per month. 関数電卓 asks for nothing beyond the download.

SPC Tools ships an update every 3 days, 関数電卓 monthly. The most recent releases landed on October 31, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | SPC Tools | 関数電卓 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Size | 13 MB | 8 MB |
| Requires iOS | **17.0** | 26.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Osman Seven](https://appshunter.io/developer/1875631963) | [Kouki Yoshimoto](https://appshunter.io/developer/1884780659) |

## What reviewers say

### SPC Tools

[App page](https://appshunter.io/ios/app/spc-tools-cpk-calculator/id6759008455)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Annual | $19.99 | per year |


### 関数電卓

[App page](https://appshunter.io/ios/app/scicalc/id6763034302)

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

**In-app purchases:** none


## Frequently asked questions

### Is SPC Tools free?

SPC Tools is free to download, with in-app purchases available.

### Is 関数電卓 free?

関数電卓 is free to download, with no in-app purchases.

### Do SPC Tools or 関数電卓 have ads?

Neither SPC Tools nor 関数電卓 shows ads.

### Which is updated more often, SPC Tools or 関数電卓?

SPC Tools ships an update every 3 days, and 関数電卓 monthly. Most recently, SPC Tools was updated on October 31, 2026 and 関数電卓 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.*