# IIEF vs ISSM

The clearest difference is update cadence: ISSM at every 6 weeks against IIEF's every 5 months. IIEF's advantage is iOS requirement (11.0 vs 15.5). 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.

IIEF ships an update every 5 months, ISSM every 6 weeks. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | IIEF | ISSM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Size | 37 MB | 121 MB |
| Requires iOS | **11.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Putu Angga Risky Raharja](https://appshunter.io/developer/1164107753) | [International Society for Sexual Medicine](https://appshunter.io/developer/1712844202) |

## What reviewers say

### IIEF

[App page](https://appshunter.io/ios/app/iief-5-erectile-dysfunction/id1506008697)

**Features:** macOS Compatibility

**In-app purchases:** none


### ISSM

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IIEF free?

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

### Is ISSM free?

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

### Do IIEF or ISSM have ads?

Neither IIEF nor ISSM shows ads.

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

IIEF ships an update every 5 months, and ISSM every 6 weeks. Most recently, IIEF was updated on September 22, 2026 and ISSM on September 19, 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.*