# Sandbook vs OpenCalorie

The clearest difference is iOS requirement: Sandbook at 18.2 against OpenCalorie's 26.5. 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.

Sandbook ships an update weekly, OpenCalorie every 4 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Sandbook | OpenCalorie |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (148 ratings)](https://appshunter.io/ios/app/sandbook-natural-voice-reader/id6745732885/reviews)** | — |
| Number of ratings | **148** | — |
| Positive reviews | 80.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Free | — |
| Size | 126 MB | 20 MB |
| Requires iOS | **18.2** | 26.5 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [SmashMelon LLC](https://appshunter.io/developer/1895995887) | [Slawomir Job](https://appshunter.io/developer/6781028541) |

## What reviewers say

### Sandbook

[App page](https://appshunter.io/ios/app/sandbook-natural-voice-reader/id6745732885)

This app reads books, documents, and articles aloud using natural-sounding voices. It offers offline functionality, supports various file formats, and allows customization of reading speed and appearance. Save web pages and printed text for later listening.

**Highlights:** Natural offline voices, Supports EPUB, PDF, DOCX, TXT, and more, Save web pages for later, Adjustable reading speed, Highlighting of spoken words, CarPlay integration, Export audio files

**Features:** Vision Pro support

**In-app purchases:** none


### OpenCalorie

[App page](https://appshunter.io/ios/app/opencalorie/id6782002595)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sandbook free?

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

### Is OpenCalorie free?

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

### Do Sandbook or OpenCalorie have ads?

Neither Sandbook nor OpenCalorie shows ads.

### Which is updated more often, Sandbook or OpenCalorie?

Sandbook ships an update weekly, and OpenCalorie every 4 days. Most recently, Sandbook was updated on October 30, 2026 and OpenCalorie on October 28, 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.*