# OPTIC Mobile (Friendly Eagle) vs ROT13 Decoder

The clearest difference is update cadence: OPTIC Mobile (Friendly Eagle) at every 3 weeks against ROT13 Decoder's every 8 months. OPTIC Mobile (Friendly Eagle) also leads on iOS requirement (12.2 vs 15.0). 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.

OPTIC Mobile (Friendly Eagle) ships an update every 3 weeks, ROT13 Decoder every 8 months. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | OPTIC Mobile (Friendly Eagle) | ROT13 Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/optic-mobile-friendly-eagle/id1459160092/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | Free | — |
| Size | 70 MB | 16 MB |
| Requires iOS | **12.2** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FRIENDLY EAGLE SOFTWARE INC.](https://appshunter.io/developer/1459160091) | [佳伟 蔡](https://appshunter.io/developer/1801859662) |

## What reviewers say

### OPTIC Mobile (Friendly Eagle)

[App page](https://appshunter.io/ios/app/optic-mobile-friendly-eagle/id1459160092)

Access and modify records from the OPTIC server on your mobile device. Create, delete, and update entries, with offline capabilities for data and documents. Sync changes back to the server when connected.

**Highlights:** View and update server records, Create and delete new records, Offline data access and saving, Downloadable documents and SDS, Customizable download settings, Syncs with OPTIC Web application

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

**In-app purchases:** none


### ROT13 Decoder

[App page](https://appshunter.io/ios/app/rot13-decoder/id6743629613)

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

**In-app purchases:** none


## Frequently asked questions

### Is OPTIC Mobile (Friendly Eagle) free?

OPTIC Mobile (Friendly Eagle) is free to download, with no in-app purchases.

### Is ROT13 Decoder free?

ROT13 Decoder is free to download, with no in-app purchases.

### Do OPTIC Mobile (Friendly Eagle) or ROT13 Decoder have ads?

Neither OPTIC Mobile (Friendly Eagle) nor ROT13 Decoder shows ads.

### Which is updated more often, OPTIC Mobile (Friendly Eagle) or ROT13 Decoder?

OPTIC Mobile (Friendly Eagle) ships an update every 3 weeks, and ROT13 Decoder every 8 months. Most recently, OPTIC Mobile (Friendly Eagle) was updated on September 8, 2026 and ROT13 Decoder on September 9, 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.*