# Tachyon vs SIONYX

The clearest difference is rating: SIONYX at 2.7 against Tachyon's 1.0. SIONYX also leads on review sentiment (27% vs 0%) and ratings volume (15 vs 1). Tachyon's advantage is update cadence (every 6 weeks vs every 5 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SIONYX holds the better App Store score, 2.7 against 1.0. That said, the two scores are not equally well evidenced: SIONYX has 15 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Tachyon's written reviews are positive against 27% of SIONYX's.

Tachyon ships an update every 6 weeks, SIONYX every 5 months. The most recent releases landed on September 26, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Tachyon | SIONYX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/tachyon/id1477577495/reviews) | **[2.7 (15 ratings)](https://appshunter.io/ios/app/sionyx/id1642888573/reviews)** |
| Number of ratings | 1 | **15** |
| Positive reviews | 0.0% of reviews | **27.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | Free | Free |
| Size | 52 MB | 128 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chris Whitehouse](https://appshunter.io/developer/1481582836) | [SiOnyx, LLC](https://appshunter.io/developer/1418868781) |

## What reviewers say

### Tachyon

[App page](https://appshunter.io/ios/app/tachyon/id1477577495)

Control your camera remotely to start/stop recordings, play back footage in slow motion, and download videos directly to your iOS device. This app enhances your camera's functionality for seamless video capture and management.

**Highlights:** Remote recording control, Slow-motion playback, Video download to device, iOS device as remote, Compatible with Tachyon cameras

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

**In-app purchases:** none


### SIONYX

[App page](https://appshunter.io/ios/app/sionyx/id1642888573)

Stream video and control your SIONYX Nightwave and OPSIN devices. This app allows for seamless command and upgrade functions for your compatible night vision equipment.

**Highlights:** Video streaming, Command and control functions, Device upgrades, Nightwave device support, OPSIN device support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tachyon free?

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

### Is SIONYX free?

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

### Which has better reviews, Tachyon or SIONYX?

SIONYX is rated higher. Tachyon averages 1.0 out of 5 from 1 ratings, while SIONYX averages 2.7 from 15 ratings.

### Do Tachyon or SIONYX have ads?

Neither Tachyon nor SIONYX shows ads.

### Which is updated more often, Tachyon or SIONYX?

Tachyon ships an update every 6 weeks, and SIONYX every 5 months. Most recently, Tachyon was updated on September 26, 2026 and SIONYX on June 3, 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.*