# ZappID vs Rheonics SensorView

The clearest difference is update cadence: ZappID at every 4 days against Rheonics SensorView's every 33 months. ZappID also leads on iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

ZappID ships an update every 4 days, Rheonics SensorView every 33 months. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | ZappID | Rheonics SensorView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rheonics-sensorview/id1557966204/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 33 months |
| Monetization | — | Free |
| Size | 11 MB | 25 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fredrik Petersson](https://appshunter.io/developer/555276018) | [Rheonics, Inc.](https://appshunter.io/developer/1557966206) |

## What reviewers say

### ZappID

[App page](https://appshunter.io/ios/app/zappid/id1455029820)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rheonics SensorView

[App page](https://appshunter.io/ios/app/rheonics-sensorview/id1557966204)

Monitor Rheonics inline viscometers and density meters wirelessly via Bluetooth LE. View real-time measurements like viscosity, density, and temperature, with options to customize graphs. Future updates will include estimated parameters.

**Highlights:** Wireless Bluetooth LE connectivity, Real-time viscosity measurement, Real-time density measurement, Real-time temperature monitoring, Customizable real-time graphs, Future estimated parameter display

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZappID free?

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

### Is Rheonics SensorView free?

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

### Do ZappID or Rheonics SensorView have ads?

Neither ZappID nor Rheonics SensorView shows ads.

### Which is updated more often, ZappID or Rheonics SensorView?

ZappID ships an update every 4 days, and Rheonics SensorView every 33 months. Most recently, ZappID was updated on September 15, 2026 and Rheonics SensorView on September 17, 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.*