# E_Test vs ISD Link

The clearest difference is rating: ISD Link at 2.1 against E_Test's 1.8. ISD Link also leads on device support (4 vs 2). E_Test's advantage is iOS requirement (9.0 vs 13.0). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ISD Link holds the better App Store score, 2.1 against 1.8. Both are backed by a comparable volume of ratings — 31 and 23 respectively. Written reviews point the same way: 15% of E_Test's written reviews are positive against 21% of ISD Link's.

## The numbers

| Metric | E_Test | ISD Link |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (31 ratings)](https://appshunter.io/ios/app/e-test/id1478623332/reviews) | **[2.1 (23 ratings)](https://appshunter.io/ios/app/isd-link/id1568620244/reviews)** |
| Number of ratings | **31** | 23 |
| Positive reviews | 15.4% of reviews | **21.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Monetization | Free | Free |
| Size | 20 MB | 61 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [杰 唐](https://appshunter.io/developer/1475646045) | [深圳艾斯特创新科技有限公司](https://appshunter.io/developer/1405370693) |

## What reviewers say

### E_Test

[App page](https://appshunter.io/ios/app/e-test/id1478623332)

This app connects to Bluetooth meters to display real-time voltage, current, and power consumption. It allows users to view historical data through curves and supports DC, AC, and USB meters for simple, direct connection.

**Highlights:** Real-time voltage, current, power display, View power consumption curves, Connects to DC, AC, USB meters, Simple Bluetooth connection, Historical data viewing

**Features:** macOS Compatibility

**In-app purchases:** none


### ISD Link

[App page](https://appshunter.io/ios/app/isd-link/id1568620244)

This app allows interaction with various smart devices. It prioritizes user privacy by saving all data locally and not collecting personal information. Bluetooth is required for device scanning and connection.

**Highlights:** Smart device interaction, Local data saving, No account registration, Bluetooth connectivity, Supports numerous device models

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E_Test free?

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

### Is ISD Link free?

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

### Which has better reviews, E_Test or ISD Link?

ISD Link is rated higher. E_Test averages 1.8 out of 5 from 31 ratings, while ISD Link averages 2.1 from 23 ratings.

### Do E_Test or ISD Link have ads?

Neither E_Test nor ISD Link 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.*