# OpenIoTHub vs PhosphorSSTV

The clearest difference is price: OpenIoTHub at Free against PhosphorSSTV's $0.99. OpenIoTHub also leads on update cadence (weekly vs every 5 months) and device support (4 vs 1). PhosphorSSTV's advantage is ads (none vs shown). On in-app purchases there is nothing between them.

OpenIoTHub is free to download; PhosphorSSTV costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OpenIoTHub ships an update weekly, PhosphorSSTV every 5 months. The most recent releases landed on September 13, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | OpenIoTHub | PhosphorSSTV |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/openiothub/id1501554327/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 5 months |
| Monetization | **Ad-supported** | Paid |
| Size | 155 MB | 3 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hefei Yunyilian Intelligent Technology Co., Ltd](https://appshunter.io/developer/1541792997) | [Stuart Woolley](https://appshunter.io/developer/315697638) |

## What reviewers say

### OpenIoTHub

[App page](https://appshunter.io/ios/app/openiothub/id1501554327)

This tool provides remote access and management for various IoT devices and intranet services. It supports multiple protocols and integrates with popular private cloud solutions and hardware.

**Highlights:** Remote IoT device management, Intranet penetration access, Supports TCP, UDP, HTTP, FTP, Integrates with private clouds (CasaOS, ZimaOS, etc.), Supports various hardware and Docker interfaces

**In-app purchases:** none


### PhosphorSSTV

[App page](https://appshunter.io/ios/app/phosphorsstv/id6761005542)

Decode Slow Scan Television (SSTV) signals in real time using your iPhone's microphone. This app transforms audio tones into images, recreating the retro aesthetic of vintage monitors. It supports ten SSTV modes and offers advanced signal analysis tools.

**Highlights:** Real-time SSTV signal decoding, Supports ten SSTV modes, Authentic CRT display aesthetic, Live FFT spectrum analysis, Automatic VIS code detection, Image logging with metadata

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenIoTHub free?

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

### Is PhosphorSSTV free?

PhosphorSSTV costs $0.99, with no in-app purchases.

### Do OpenIoTHub or PhosphorSSTV have ads?

OpenIoTHub shows ads; PhosphorSSTV does not.

### Which is updated more often, OpenIoTHub or PhosphorSSTV?

OpenIoTHub ships an update weekly, and PhosphorSSTV every 5 months. Most recently, OpenIoTHub was updated on September 13, 2026 and PhosphorSSTV on September 5, 2026.

---

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