# Chapters vs SimpleSigma+

The clearest difference is review sentiment: SimpleSigma+ at 100% against Chapters's 33%. SimpleSigma+ also leads on update cadence (every 3 weeks vs every 7 months) and price ($3.99 vs $9.99). Chapters's advantage is device support (4 vs 1) and iOS requirement (15.0 vs 17.1). On ads, in-app purchases and monetization model there is nothing between them.

Chapters costs $9.99 and SimpleSigma+ $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Chapters ships an update every 7 months, SimpleSigma+ every 3 weeks. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Chapters | SimpleSigma+ |
| --- | --- | --- |
| Price | $9.99 | **$3.99** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/chapters/id946792169/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 1 MB | 1 MB |
| Requires iOS | **15.0** | 17.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Two-Byte Software Inc.](https://appshunter.io/developer/946792168) | [MUTSUAKI KIKUCHI](https://appshunter.io/developer/1874283283) |

## What reviewers say

### Chapters

[App page](https://appshunter.io/ios/app/chapters/id946792169)

This app allows users to create and edit ePub ebook files. It supports viewing, formatting text, and saving changes. Features like iCloud sync, autosave, and unlimited undo enhance the editing experience.

**Highlights:** Create and edit ePub files, View documents in vertical scroll, Edit and format text, Save changes to files, iCloud Drive sync, Autosaving, Unlimited undo/redo

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Chapters free?

Chapters costs $9.99, with no in-app purchases.

### Is SimpleSigma+ free?

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

### Do Chapters or SimpleSigma+ have ads?

Neither Chapters nor SimpleSigma+ shows ads.

### Which is updated more often, Chapters or SimpleSigma+?

Chapters ships an update every 7 months, and SimpleSigma+ every 3 weeks. Most recently, Chapters was updated on October 2, 2026 and SimpleSigma+ on October 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.*