# Hotviewer（WIFI Microscope） vs ISM

The clearest difference is review sentiment: ISM at 100% against Hotviewer（WIFI Microscope）'s 0%. ISM also leads on rating (5.0 vs 3.0). Hotviewer（WIFI Microscope）'s advantage is update cadence (every 3 months vs every 7 months) and iOS requirement (6.0 vs 12.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

ISM holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews point the same way: 0% of Hotviewer（WIFI Microscope）'s written reviews are positive against 100% of ISM's.

Hotviewer（WIFI Microscope） ships an update every 3 months, ISM every 7 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Hotviewer（WIFI Microscope） | ISM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (5 ratings)](https://appshunter.io/ios/app/hotviewerwifi-microscope/id877134985/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/ism-wf200/id6698873286/reviews)** |
| Number of ratings | 5 | **9** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 4 MB | 2 MB |
| Requires iOS | **6.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [东献 刘](https://appshunter.io/developer/566565467) | [Insize Co., Ltd.](https://appshunter.io/developer/1489274019) |

## What reviewers say

### Hotviewer（WIFI Microscope）

[App page](https://appshunter.io/ios/app/hotviewerwifi-microscope/id877134985)

Connect a digital microscope to your iPhone or iPad via Wi-Fi to view live image streams. This application receives and displays the video feed from the microscope.

**Highlights:** Wi-Fi microscope connection, Live image streaming, Display microscope feed, iOS device support

**Features:** macOS Compatibility

**In-app purchases:** none


### ISM

[App page](https://appshunter.io/ios/app/ism-wf200/id6698873286)

Explore the microscopic world with a WiFi digital microscope. Capture images, record videos, and perform measurements. Ideal for educational, research, and hobbyist use.

**Highlights:** Microscopic observation, Image capture, Video recording, Measurement tools, WiFi microscope control

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hotviewer（WIFI Microscope） free?

Hotviewer（WIFI Microscope） is free to download, with no in-app purchases.

### Is ISM free?

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

### Which has better reviews, Hotviewer（WIFI Microscope） or ISM?

ISM is rated higher. Hotviewer（WIFI Microscope） averages 3.0 out of 5 from 5 ratings, while ISM averages 5.0 from 9 ratings.

### Do Hotviewer（WIFI Microscope） or ISM have ads?

Neither Hotviewer（WIFI Microscope） nor ISM shows ads.

### Which is updated more often, Hotviewer（WIFI Microscope） or ISM?

Hotviewer（WIFI Microscope） ships an update every 3 months, and ISM every 7 months. Most recently, Hotviewer（WIFI Microscope） was updated on October 24, 2026 and ISM on October 23, 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.*