# Ultraviolet vs BTS Tracker

The clearest difference is update cadence: BTS Tracker at every 7 months against Ultraviolet's every 23 months. Ultraviolet's advantage is iOS requirement (11.0 vs 13.0). 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.

Ultraviolet ships an update every 23 months, BTS Tracker every 7 months. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Ultraviolet | BTS Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 7 months** |
| Size | 21 MB | 49 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [claxio.com](https://appshunter.io/developer/1165013290) | [SecurCube SRL](https://appshunter.io/developer/1711761642) |

## What reviewers say

### Ultraviolet

[App page](https://appshunter.io/ios/app/ultraviolet/id1576208393)

**Features:** macOS Compatibility

**In-app purchases:** none


### BTS Tracker

[App page](https://appshunter.io/ios/app/bts-tracker/id6469318661)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ultraviolet free?

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

### Is BTS Tracker free?

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

### Do Ultraviolet or BTS Tracker have ads?

Neither Ultraviolet nor BTS Tracker shows ads.

### Which is updated more often, Ultraviolet or BTS Tracker?

Ultraviolet ships an update every 23 months, and BTS Tracker every 7 months. Most recently, Ultraviolet was updated on September 29, 2026 and BTS Tracker on October 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.*