# MyRPMCalc vs one.com Mail

The clearest difference is price: one.com Mail at Free against MyRPMCalc's $1.99. one.com Mail also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On review sentiment, ads and in-app purchases there is nothing between them.

one.com Mail is free to download; MyRPMCalc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | MyRPMCalc | one.com Mail |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Monetization | Paid | **Free** |
| Size | 3 MB | 75 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [C&S Industries, LLC](https://appshunter.io/developer/6785223876) | [One.com A/S](https://appshunter.io/developer/458335495) |

## What reviewers say

### MyRPMCalc

[App page](https://appshunter.io/ios/app/myrpmcalc/id6792172193)

Instantly measure engine RPM by listening to its sound through your phone's microphone. No external sensors or adapters needed. Ideal for diagnosing and monitoring various engines hands-free.

**Highlights:** Instant RPM reading from sound, No OBD adapter or sensors required, Supports 1-12 cylinders, 2-stroke or 4-stroke cycle selection, Auto-Freeze for hands-free use, Manual Freeze/Resume button

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

**In-app purchases:** none


### one.com Mail

[App page](https://appshunter.io/ios/app/onecom-mail/id6793130546)

Access and manage your email on the go with this intuitive application. Read, write, and organize your messages efficiently from your mobile device, ensuring you stay connected to important conversations without needing a computer.

**Highlights:** Manage multiple email accounts, Organize inbox with filters, Read emails in distraction-free layout, Compose and send emails, Receive new email notifications, Perform actions on multiple emails

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

**In-app purchases:** none


## Frequently asked questions

### Is MyRPMCalc free?

MyRPMCalc costs $1.99, with no in-app purchases.

### Is one.com Mail free?

one.com Mail is free to download, with no in-app purchases.

### Do MyRPMCalc or one.com Mail have ads?

Neither MyRPMCalc nor one.com Mail shows ads.

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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.*