# EP Calipers vs PrepMD OMNI Go

The clearest difference is price: PrepMD OMNI Go at Free against EP Calipers's $1.99. PrepMD OMNI Go also leads on iOS requirement (15.6 vs 17.6). EP Calipers's advantage is chart position (#68 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

PrepMD OMNI Go is free to download; EP Calipers costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | EP Calipers | PrepMD OMNI Go |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/ep-calipers/id982313078/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Paid | — |
| Best chart rank | **#68** | — |
| Size | 14 MB | 29 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [EP Studios](https://appshunter.io/developer/574231798) | [PrepMD](https://appshunter.io/developer/1735750595) |

## What reviewers say

### EP Calipers

[App page](https://appshunter.io/ios/app/ep-calipers/id982313078)

**Currently charting:** #68 Top Paid · Medical (US App Store)

This medical app allows users to measure intervals and angles on electrocardiogram (ECG) images. It's designed for healthcare professionals to accurately analyze ECGs from photos or PDFs, aiding in calculations like heart rate and QT intervals.

**Highlights:** Measure ECG intervals, Measure ECG angles, Calculate mean heart rate, Determine corrected QT interval, Analyze ECG photos and PDFs, Supports Brugada syndrome beta angle measurement

**Features:** Vision Pro support

**In-app purchases:** none


### PrepMD OMNI Go

[App page](https://appshunter.io/ios/app/prepmd-omni-go/id6743807775)

**In-app purchases:** none


## Frequently asked questions

### Is EP Calipers free?

EP Calipers costs $1.99, with no in-app purchases.

### Is PrepMD OMNI Go free?

PrepMD OMNI Go is free to download, with no in-app purchases.

### Do EP Calipers or PrepMD OMNI Go have ads?

Neither EP Calipers nor PrepMD OMNI Go shows ads.

### Which is updated more often, EP Calipers or PrepMD OMNI Go?

EP Calipers ships an update every 3 months, and PrepMD OMNI Go every 3 months. Most recently, EP Calipers was updated on November 1, 2026 and PrepMD OMNI Go on October 30, 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.*