# Calculator Express with Notes vs SentriX

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

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

Calculator Express with Notes ships an update monthly, SentriX every 5 weeks. The most recent releases landed on August 19, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Calculator Express with Notes | SentriX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (43 ratings)](https://appshunter.io/ios/app/calculator-express-with-notes/id1604079825/reviews)** | — |
| Number of ratings | **43** | — |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 31 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RAMAN KHVASHCHEUSKI](https://appshunter.io/developer/1437493298) | [Crime Stoppers International Inc](https://appshunter.io/developer/1728371439) |

## What reviewers say

### 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 |


### SentriX

[App page](https://appshunter.io/ios/app/sentrix/id6476953273)

**In-app purchases:** none


## Frequently asked questions

### Is Calculator Express with Notes free?

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

### Is SentriX free?

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

### Do Calculator Express with Notes or SentriX have ads?

Calculator Express with Notes shows ads; SentriX does not.

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

Calculator Express with Notes ships an update monthly, and SentriX every 5 weeks. Most recently, Calculator Express with Notes was updated on August 19, 2026 and SentriX on September 17, 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.*