# ISC NIRScan vs VoltSense

The clearest difference is update cadence: ISC NIRScan at every 2 months against VoltSense's every 6 months. ISC NIRScan also leads on iOS requirement (12.0 vs 15.6). 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.

ISC NIRScan ships an update every 2 months, VoltSense every 6 months. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | ISC NIRScan | VoltSense |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 38 MB | 80 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [He Yi Hsieh](https://appshunter.io/developer/1081259026) | [Purpletail OÜ](https://appshunter.io/developer/1761328539) |

## What reviewers say

### ISC NIRScan

[App page](https://appshunter.io/ios/app/isc-nirscan/id1414155482)

**Features:** macOS Compatibility

**In-app purchases:** none


### VoltSense

[App page](https://appshunter.io/ios/app/voltsense/id6621183757)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ISC NIRScan free?

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

### Is VoltSense free?

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

### Do ISC NIRScan or VoltSense have ads?

Neither ISC NIRScan nor VoltSense shows ads.

### Which is updated more often, ISC NIRScan or VoltSense?

ISC NIRScan ships an update every 2 months, and VoltSense every 6 months. Most recently, ISC NIRScan was updated on November 6, 2026 and VoltSense on November 8, 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.*