# Optim System app vs Shoal

The clearest difference is update cadence: Optim System app at every 9 days against Shoal's every 2 months. 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.

Optim System app ships an update every 9 days, Shoal every 2 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | Optim System app | Shoal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/shoal/id6737417897/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 90.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | — | Free |
| Size | 44 MB | 149 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Optim Systems, Ltd.](https://appshunter.io/developer/1713704866) | [Algbra FS UK Limited](https://appshunter.io/developer/1610109637) |

## What reviewers say

### Optim System app

[App page](https://appshunter.io/ios/app/optim-system-app-weopsy/id6470450913)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shoal

[App page](https://appshunter.io/ios/app/shoal/id6737417897)

Grow your savings while supporting sustainable global projects. Track your positive environmental impact and contribute to UN Sustainable Development Goals. Your savings are protected and help fund green initiatives.

**Highlights:** Earn returns on savings, Support green and social projects, Track CO2e avoidance, Track clean water generation, Contribute to UN SDGs, FSCS protected savings

**In-app purchases:** none


## Frequently asked questions

### Is Optim System app free?

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

### Is Shoal free?

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

### Do Optim System app or Shoal have ads?

Neither Optim System app nor Shoal shows ads.

### Which is updated more often, Optim System app or Shoal?

Optim System app ships an update every 9 days, and Shoal every 2 months. Most recently, Optim System app was updated on October 30, 2026 and Shoal on October 30, 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.*