# FSSD vs Griffin Reader Pro

The clearest difference is update cadence: Griffin Reader Pro at every 2 days against FSSD's every 6 months. Griffin Reader Pro also leads on iOS requirement (9.0 vs 11.0). 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.

FSSD ships an update every 6 months, Griffin Reader Pro every 2 days. The most recent releases landed on September 11, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | FSSD | Griffin Reader Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 days** |
| Size | 53 MB | 93 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Invincible Four Season Technology Co., Ltd.](https://appshunter.io/developer/1686851585) | [骏 杨](https://appshunter.io/developer/1513725819) |

## What reviewers say

### FSSD

[App page](https://appshunter.io/ios/app/fssd/id6450849738)

**Features:** macOS Compatibility

**In-app purchases:** none


### Griffin Reader Pro

[App page](https://appshunter.io/ios/app/griffin-reader-pro/id6745780058)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FSSD free?

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

### Is Griffin Reader Pro free?

Griffin Reader Pro is free to download, with no in-app purchases.

### Do FSSD or Griffin Reader Pro have ads?

Neither FSSD nor Griffin Reader Pro shows ads.

### Which is updated more often, FSSD or Griffin Reader Pro?

FSSD ships an update every 6 months, and Griffin Reader Pro every 2 days. Most recently, FSSD was updated on September 11, 2026 and Griffin Reader Pro on September 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*