# 変数電卓+ vs CC31

The clearest difference is in-app purchases: 変数電卓+ at none against CC31's 3. 変数電卓+ also leads on ads (none vs shown) and update cadence (daily vs every 9 days). On price and device support there is nothing between them.

Both are free to download. CC31 sells 3 one-off in-app purchases. 変数電卓+ asks for nothing beyond the download.

変数電卓+ ships an update daily, CC31 every 9 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 変数電卓+ | CC31 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/cc31-neon-calendar-planner/id6747662066/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 27 MB | 39 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Nemoto](https://appshunter.io/developer/1817950976) | [shogo isaji](https://appshunter.io/developer/1720113915) |

## What reviewers say

### 変数電卓+

[App page](https://appshunter.io/ios/app/plus/id6746694817)

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

**In-app purchases:** none


### CC31

[App page](https://appshunter.io/ios/app/cc31-neon-calendar-planner/id6747662066)

Enhance your existing iPhone calendar with a bold, dark interface and neon accents. View and edit your schedule, add notes, and check upcoming events with customizable Home Screen widgets.

**Highlights:** Neon-themed calendar interface, View and edit existing iPhone calendar events, Home Screen widgets for upcoming events, Timeline and agenda views, Integrated notes for tasks and ideas, Cyberpunk-inspired design

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Style Pack | $2.99 | one-time |
| Theme Pack | $2.99 | one-time |
| Remove ads | $2.99 | one-time |


## Frequently asked questions

### Is 変数電卓+ free?

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

### Is CC31 free?

CC31 is free to download, with in-app purchases available.

### Do 変数電卓+ or CC31 have ads?

CC31 shows ads; 変数電卓+ does not.

### Which is updated more often, 変数電卓+ or CC31?

変数電卓+ ships an update daily, and CC31 every 9 days. Most recently, 変数電卓+ was updated on October 30, 2026 and CC31 on November 5, 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.*