# SDBG vs World Discovery Guidebook

The clearest difference is update cadence: World Discovery Guidebook at monthly against SDBG's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

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

SDBG ships an update every 7 months, World Discovery Guidebook monthly. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | SDBG | World Discovery Guidebook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Size | 131 MB | 38 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [San Diego Botanic Garden](https://appshunter.io/developer/1735583841) | [HUD d.o.o.](https://appshunter.io/developer/1865129094) |

## What reviewers say

### SDBG

[App page](https://appshunter.io/ios/app/sdbg/id6479328871)

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

**In-app purchases:** none


### World Discovery Guidebook

[App page](https://appshunter.io/ios/app/world-discovery-guidebook/id6757186554)

**In-app purchases:** none


## Frequently asked questions

### Is SDBG free?

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

### Is World Discovery Guidebook free?

World Discovery Guidebook is free to download, with no in-app purchases.

### Do SDBG or World Discovery Guidebook have ads?

Neither SDBG nor World Discovery Guidebook shows ads.

### Which is updated more often, SDBG or World Discovery Guidebook?

SDBG ships an update every 7 months, and World Discovery Guidebook monthly. Most recently, SDBG was updated on September 17, 2026 and World Discovery Guidebook on September 14, 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.*