# EP Calipers vs DeviceAID

The clearest difference is price: DeviceAID at Free against EP Calipers's $1.99. EP Calipers's advantage is ads (none vs shown) and update cadence (every 3 months vs every 14 months). On in-app purchases and device support there is nothing between them.

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

EP Calipers ships an update every 3 months, DeviceAID every 14 months. The most recent releases landed on September 13, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | EP Calipers | DeviceAID |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | **Every 3 months** | Every 14 months |
| Monetization | Paid | — |
| Best chart rank | **#168** | — |
| Size | 9 MB | 60 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [EP Studios](https://appshunter.io/developer/574231798) | [Cardiology Apps LLC](https://appshunter.io/developer/1639925847) |

## What reviewers say

### EP Calipers

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

**Currently charting:** #168 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


### DeviceAID

[App page](https://appshunter.io/ios/app/deviceaid/id6449780080)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EP Calipers free?

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

### Is DeviceAID free?

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

### Do EP Calipers or DeviceAID have ads?

DeviceAID shows ads; EP Calipers does not.

### Which is updated more often, EP Calipers or DeviceAID?

EP Calipers ships an update every 3 months, and DeviceAID every 14 months. Most recently, EP Calipers was updated on September 13, 2026 and DeviceAID on May 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*