# Cromogenia Units vs Calculator Express with Notes

The clearest difference is in-app purchases: Cromogenia Units at none against Calculator Express with Notes's 2. Cromogenia Units also leads on ads (none vs shown) and update cadence (every 3 days vs monthly). Calculator Express with Notes's advantage is device support (4 vs 2). On price and iOS requirement there is nothing between them.

Both are free to download. Calculator Express with Notes sells 2 one-off in-app purchases. Cromogenia Units asks for nothing beyond the download.

Cromogenia Units ships an update every 3 days, Calculator Express with Notes monthly. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cromogenia Units | Calculator Express with Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (47 ratings)](https://appshunter.io/ios/app/calculator-express-with-notes/id1604079825/reviews)** |
| Number of ratings | — | **47** |
| Positive reviews | — | 69.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 28 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Andres Mico](https://appshunter.io/developer/855353623) | [RAMAN KHVASHCHEUSKI](https://appshunter.io/developer/1437493298) |

## What reviewers say

### Cromogenia Units

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculator Express with Notes

[App page](https://appshunter.io/ios/app/calculator-express-with-notes/id1604079825)

A beautifully designed utility app offering six essential tools, including currency, unit, and percentage converters, plus calculators for BMI, tips, and world time. Users can customize the app's appearance and manage calculation history with notes and labels.

**Highlights:** Currency converter, Unit converter, Percentage calculator, BMI calculator, Tip calculator, World time converter, Customizable appearance, Calculation history with notes

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads -50% off | $1.99 | one-time |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Cromogenia Units free?

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

### Is Calculator Express with Notes free?

Calculator Express with Notes is free to download, with in-app purchases available.

### Do Cromogenia Units or Calculator Express with Notes have ads?

Calculator Express with Notes shows ads; Cromogenia Units does not.

### Which is updated more often, Cromogenia Units or Calculator Express with Notes?

Cromogenia Units ships an update every 3 days, and Calculator Express with Notes monthly. Most recently, Cromogenia Units was updated on October 9, 2026 and Calculator Express with Notes on October 24, 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.*