# Evolvace E3O vs Subtraction App

The clearest difference is price: Subtraction App at Free against Evolvace E3O's $4.99. Subtraction App also leads on update cadence (every 2 weeks vs every 7 months). Evolvace E3O's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Subtraction App is free to download; Evolvace E3O costs $4.99 up front. Evolvace E3O sells 1 one-off in-app purchase and Subtraction App sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Evolvace E3O ships an update every 7 months, Subtraction App every 2 weeks. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Evolvace E3O | Subtraction App |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Size | 76 MB | 26 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tetsuyoshi Morikawa](https://appshunter.io/developer/430144969) | [Foodmenu.world Inc.](https://appshunter.io/developer/1438351063) |

## What reviewers say

### Evolvace E3O

[App page](https://appshunter.io/ios/app/evolvace-e3o/id981898557)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Addition | $0.99 | one-time |


### Subtraction App

[App page](https://appshunter.io/ios/app/subtraction-app/id1622934481)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | per month |


## Frequently asked questions

### Is Evolvace E3O free?

Evolvace E3O costs $4.99, and also offers in-app purchases.

### Is Subtraction App free?

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

### Do Evolvace E3O or Subtraction App have ads?

Subtraction App shows ads; Evolvace E3O does not.

### Which is updated more often, Evolvace E3O or Subtraction App?

Evolvace E3O ships an update every 7 months, and Subtraction App every 2 weeks. Most recently, Evolvace E3O was updated on October 3, 2026 and Subtraction App on October 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.*