# Cromogenia Units vs Calculator +ㅤ

The clearest difference is in-app purchases: Cromogenia Units at none against Calculator +ㅤ's 6. Cromogenia Units also leads on ads (none vs shown) and update cadence (every 3 days vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Calculator +ㅤ sells 6 in-app purchases, starting at $2.99 per 7 days. Cromogenia Units asks for nothing beyond the download.

Cromogenia Units ships an update every 3 days, Calculator +ㅤ fortnightly. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Cromogenia Units | Calculator +ㅤ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (4.6K ratings)](https://appshunter.io/ios/app/calculator-plus/id1597933199/reviews)** |
| Number of ratings | — | **4.6K** |
| Positive reviews | — | 46.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | — | Subscription |
| Size | 2 MB | 55 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andres Mico](https://appshunter.io/developer/855353623) | [Rocket Apps GmbH](https://appshunter.io/developer/1566586717) |

## What reviewers say

### Cromogenia Units

[App page](https://appshunter.io/ios/app/cromogenia-units/id1490174371)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculator +ㅤ

[App page](https://appshunter.io/ios/app/calculator-plus/id1597933199)

This app simplifies math with basic, scientific, and fraction calculations. It also features a unique snap-and-scribble function to solve problems from photos. Customize your experience with themes and access a calculation history.

**Highlights:** Snap and Scribble Calculator, Basic Calculator, Scientific Calculator, Fraction Calculator, Currency Converter, Calculation History, Customizable Themes

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rocket Apps PRO Weekly | $2.99 | per 7 days |
| Rocket Apps PRO Monthly | $4.99 | per month |
| Rocket Apps PRO Yearly | $9.99 | per year |
| Rocket Apps PRO Offer | $19.99 | per year |
| Rocket Apps PRO Yearly | $19.99 | per year |
| Rocket Apps PRO Yearly | $29.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate calculations
- 🎨 Excellent visuals
- 💡 Helpful for academic work

**What reviewers complain about**

- 💰 Subscription model too expensive
- 🔍 Decimal entry quirks
- 📺 Too many ads
- 🔒 Locked features behind paywall

**Reported bugs**

- Inaccurate square root calculations
- Compatibility issues on iPad
- Decimal point not recognized

**Requested features**

- Negative number support
- Improved fraction calculator
- Scientific calculator layout
- Option to disable history feature


## Frequently asked questions

### Is Cromogenia Units free?

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

### Is Calculator +ㅤ free?

Calculator +ㅤ is free to download, with in-app purchases available.

### Do Cromogenia Units or Calculator +ㅤ have ads?

Calculator +ㅤ shows ads; Cromogenia Units does not.

### Which is updated more often, Cromogenia Units or Calculator +ㅤ?

Cromogenia Units ships an update every 3 days, and Calculator +ㅤ fortnightly. Most recently, Cromogenia Units was updated on October 9, 2026 and Calculator +ㅤ on October 18, 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.*