# Fishtank vs Sea Focus

The clearest difference is update cadence: Fishtank at every 4 days against Sea Focus's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Fishtank sells 4 one-off in-app purchases and Sea Focus sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Fishtank ships an update every 4 days, Sea Focus every 5 months. The most recent releases landed on September 30, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Fishtank | Sea Focus |
| --- | --- | --- |
| 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 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 36 MB |
| Requires iOS | 18.2 | **17.2** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jiajun Zhang](https://appshunter.io/developer/1819165423) | [Cevahir Turgut](https://appshunter.io/developer/1296608296) |

## 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 |


### Sea Focus

[App page](https://appshunter.io/ios/app/sea-focus-deep-work-timer/id6760896324)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly: Ocean Focus Timer Weekly | $3.99 | per 7 days |
| Monthly: Deep Work Focus Monthly | $6.99 | per month |
| Ocean Focus Deep Work Shield Yearly | $24.99 | per year |


## Frequently asked questions

### Is Fishtank free?

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

### Is Sea Focus free?

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

### Do Fishtank or Sea Focus have ads?

Neither Fishtank nor Sea Focus shows ads.

### Which is updated more often, Fishtank or Sea Focus?

Fishtank ships an update every 4 days, and Sea Focus every 5 months. Most recently, Fishtank was updated on September 30, 2026 and Sea Focus 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.*