# ISSM vs UrologBook

The clearest difference is price: ISSM at Free against UrologBook's $4.99. ISSM also leads on in-app purchases (none vs 1). UrologBook's advantage is update cadence (every 3 days vs every 6 weeks). On ads, device support and iOS requirement there is nothing between them.

ISSM is free to download; UrologBook costs $4.99 up front. UrologBook sells 1 one-off in-app purchase. ISSM asks for nothing beyond the download.

ISSM ships an update every 6 weeks, UrologBook every 3 days. The most recent releases landed on October 6, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ISSM | UrologBook |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Size | 121 MB | 184 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [International Society for Sexual Medicine](https://appshunter.io/developer/1712844202) | [Sandro Gaspar](https://appshunter.io/developer/1889980560) |

## What reviewers say

### ISSM

[App page](https://appshunter.io/ios/app/issm/id6470016670)

**Features:** macOS Compatibility

**In-app purchases:** none


### UrologBook

[App page](https://appshunter.io/ios/app/urologbook/id6761499193)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UrologBook Pro | $12.99 | one-time |


## Frequently asked questions

### Is ISSM free?

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

### Is UrologBook free?

UrologBook costs $4.99, and also offers in-app purchases.

### Do ISSM or UrologBook have ads?

Neither ISSM nor UrologBook shows ads.

### Which is updated more often, ISSM or UrologBook?

ISSM ships an update every 6 weeks, and UrologBook every 3 days. Most recently, ISSM was updated on October 6, 2026 and UrologBook 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.*