# SimpleSigma+ vs Idea Web

SimpleSigma+ and Idea Web are too close to call on the numbers: across 7 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

SimpleSigma+ costs $3.99 and Idea Web $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SimpleSigma+ ships an update every 3 weeks, Idea Web every 5 weeks. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SimpleSigma+ | Idea Web |
| --- | --- | --- |
| Price | $3.99 | $3.99 |
| Rating | — | **[2.0 (2 ratings)](https://appshunter.io/ios/app/idea-web-mindmap-outline/id6451052604/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Paid | Paid |
| Size | 1 MB | 13 MB |
| Requires iOS | 17.1 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [MUTSUAKI KIKUCHI](https://appshunter.io/developer/1874283283) | [harry bloch](https://appshunter.io/developer/1130009832) |

## 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


### Idea Web

[App page](https://appshunter.io/ios/app/idea-web-mindmap-outline/id6451052604)

Capture, organize, and visualize your thoughts and ideas into interactive mind maps. This tool transforms complex concepts into actionable plans with a user-friendly interface for dynamic brainstorming and idea management.

**Highlights:** Interactive mind mapping, Visual idea webs, Color-coded thoughts, Easy rearrangement of entries, Progress tracking, Actionable plan transformation

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

**In-app purchases:** none


## Frequently asked questions

### Is SimpleSigma+ free?

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

### Is Idea Web free?

Idea Web costs $3.99, with no in-app purchases.

### Do SimpleSigma+ or Idea Web have ads?

Neither SimpleSigma+ nor Idea Web shows ads.

### Which is updated more often, SimpleSigma+ or Idea Web?

SimpleSigma+ ships an update every 3 weeks, and Idea Web every 5 weeks. Most recently, SimpleSigma+ was updated on October 7, 2026 and Idea Web on October 13, 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.*