# Tri vs UoP Bus

The clearest difference is iOS requirement: Tri at 7.0 against UoP Bus's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Tri ships an update every 2 months, UoP Bus every 3 months. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Tri | UoP Bus |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 9.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | — |
| Size | 21 MB | 7 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [interpet.co.uk](https://appshunter.io/developer/1226255981) | [MICHAEL KIMBERLY SVRCEK](https://appshunter.io/developer/1738835413) |

## What reviewers say

### Tri

[App page](https://appshunter.io/ios/app/tri-spec-2/id1459336568)

Control your aquarium lighting with customizable settings. Schedule sunrise and sunset effects, adjust colors, and access support resources. Requires a specific controller for advanced features.

**Highlights:** Instant controls, 24-hour timer, Customizable colors, Sunrise & sunset simulation, Biotope pre-sets (with controller), Storm function (with controller)

**Features:** macOS Compatibility

**In-app purchases:** none


### UoP Bus

[App page](https://appshunter.io/ios/app/uop-bus/id6736377088)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tri free?

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

### Is UoP Bus free?

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

### Do Tri or UoP Bus have ads?

Neither Tri nor UoP Bus shows ads.

### Which is updated more often, Tri or UoP Bus?

Tri ships an update every 2 months, and UoP Bus every 3 months. Most recently, Tri was updated on October 17, 2026 and UoP Bus on October 6, 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.*