# SimpleSigma+ vs Todoスケジュール

The clearest difference is price: Todoスケジュール at Free against SimpleSigma+'s $3.99. SimpleSigma+'s advantage is update cadence (every 3 weeks vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Todoスケジュール is free to download; SimpleSigma+ costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SimpleSigma+ ships an update every 3 weeks, Todoスケジュール every 3 months. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | SimpleSigma+ | Todoスケジュール |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Paid | — |
| Size | 1 MB | 13 MB |
| Requires iOS | **17.1** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MUTSUAKI KIKUCHI](https://appshunter.io/developer/1874283283) | [Taichi Terasaki](https://appshunter.io/developer/1714435050) |

## What reviewers say

### SimpleSigma+

[App page](https://appshunter.io/ios/app/simplesigma-plus/id1522991950)

This app simplifies numerical tabulation with three distinct spreadsheet types for various calculation needs. It offers quick data input, immediate recalculation, and convenient features like CSV import/export and tax settings.

**Highlights:** Three spreadsheet types (Simple, Duplex, Shopping), Quick data input and immediate recalculation, Swipeable keyboard for cell navigation, Customizable consumption tax settings, Save and reuse calculation data, CSV data import and export

**Features:** macOS Compatibility

**In-app purchases:** none


### Todoスケジュール

[App page](https://appshunter.io/ios/app/todo-1/id6474942629)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SimpleSigma+ free?

SimpleSigma+ costs $3.99, with no in-app purchases.

### Is Todoスケジュール free?

Todoスケジュール is free to download, with no in-app purchases.

### Do SimpleSigma+ or Todoスケジュール have ads?

Neither SimpleSigma+ nor Todoスケジュール shows ads.

### Which is updated more often, SimpleSigma+ or Todoスケジュール?

SimpleSigma+ ships an update every 3 weeks, and Todoスケジュール every 3 months. Most recently, SimpleSigma+ was updated on October 7, 2026 and Todoスケジュール on September 30, 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.*