# Sigma Office vs Infinity Book

The clearest difference is iOS requirement: Sigma Office at 12.4 against Infinity Book's 14.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 8, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Sigma Office | Infinity Book |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 81 MB | 144 MB |
| Requires iOS | **12.4** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Joaquin Guevara](https://appshunter.io/developer/1443082715) | [Elfinbook SRL](https://appshunter.io/developer/6778315449) |

## What reviewers say

### Sigma Office

[App page](https://appshunter.io/ios/app/sigma-office/id1533340093)

**In-app purchases:** none


### Infinity Book

[App page](https://appshunter.io/ios/app/infinity-book/id6529560065)

**In-app purchases:** none


## Frequently asked questions

### Is Sigma Office free?

Sigma Office is free to download, with no in-app purchases.

### Is Infinity Book free?

Infinity Book is free to download, with no in-app purchases.

### Do Sigma Office or Infinity Book have ads?

Neither Sigma Office nor Infinity Book shows ads.

### Which is updated more often, Sigma Office or Infinity Book?

Sigma Office ships an update every 3 weeks, and Infinity Book every 3 weeks. Most recently, Sigma Office was updated on September 8, 2026 and Infinity Book on September 23, 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.*