# Fishtank vs Cuboo

Fishtank and Cuboo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Fishtank sells 4 one-off in-app purchases and Cuboo sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Fishtank ships an update every 4 days, Cuboo every 5 days. The most recent releases landed on June 11, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Fishtank | Cuboo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/fishtank-focus-app/id6747935306/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 89 MB |
| Requires iOS | 18.2 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jiajun Zhang](https://appshunter.io/developer/1819165423) | [STEFAN-ANDREI HATEGAN](https://appshunter.io/developer/1814387683) |

## What reviewers say

### Fishtank

[App page](https://appshunter.io/ios/app/fishtank-focus-app/id6747935306)

Enhance your concentration with a unique approach to productivity. This app gamifies focus sessions, allowing you to build a virtual aquarium filled with discovered fish. Earn rewards and track your progress as you stay on task.

**Highlights:** Customizable focus session lengths, App blocking for distraction prevention, Ambient background options, Progress tracking, Earn mystery lootboxes, Discover and collect rare fish, Virtual aquarium simulation

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Platinum Lootbox | $0.99 | one-time |
| Unlock Backgrounds | $1.99 | one-time |
| Speed Boost | $1.99 | one-time |
| 10x Platinum Lootboxes | $6.99 | one-time |


### Cuboo

[App page](https://appshunter.io/ios/app/cuboo-hyperfocus-timer/id6780962486)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cuboo Pro Monthly | $3.99 | per month |
| Cuboo Pro Annual | $18.99 | per year |
| Cuboo Pro Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Fishtank free?

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

### Is Cuboo free?

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

### Do Fishtank or Cuboo have ads?

Neither Fishtank nor Cuboo shows ads.

### Which is updated more often, Fishtank or Cuboo?

Fishtank ships an update every 4 days, and Cuboo every 5 days. Most recently, Fishtank was updated on June 11, 2026 and Cuboo on September 11, 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.*