# CBTC Timer vs Aquarium Hub

The clearest difference is in-app purchases: CBTC Timer at none against Aquarium Hub's 2. CBTC Timer also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Aquarium Hub sells 2 in-app purchases, starting at $4.99 per month. CBTC Timer asks for nothing beyond the download.

CBTC Timer ships an update weekly, Aquarium Hub every 2 weeks. Both last shipped on October 13, 2026.

## The numbers

| Metric | CBTC Timer | Aquarium Hub |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | — | Freemium |
| Size | 1 MB | 30 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mauro Mendonca](https://appshunter.io/developer/442007421) | [Jeferson Stutz](https://appshunter.io/developer/1896518955) |

## What reviewers say

### CBTC Timer

[App page](https://appshunter.io/ios/app/cbtc-timer/id6749275703)

**In-app purchases:** none


### Aquarium Hub

[App page](https://appshunter.io/ios/app/aquarium-hub/id6767903967)

This app helps aquarists organize and understand their aquariums with data-driven insights. It connects parameters, biology, and routines to provide actionable information for maintaining a healthy aquatic environment. Features include reef balance analysis, species information, and guided setup for new tanks.

**Highlights:** Reef Balance analysis, Marine species database, 60-day guided aquarium setup, Triton ICP test result integration, Dosage and stock management, Maintenance and routine tracking, Aquarium history and evolution tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aquarium Hub Intelligence Monthly | $4.99 | per month |
| Aquarium Hub Intelligence Annual | $49.99 | per year |


## Frequently asked questions

### Is CBTC Timer free?

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

### Is Aquarium Hub free?

Aquarium Hub is free to download, with in-app purchases available.

### Do CBTC Timer or Aquarium Hub have ads?

Neither CBTC Timer nor Aquarium Hub shows ads.

### Which is updated more often, CBTC Timer or Aquarium Hub?

CBTC Timer ships an update weekly, and Aquarium Hub every 2 weeks. Most recently, CBTC Timer was updated on October 13, 2026 and Aquarium Hub on October 13, 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.*