# ISC NIRScan vs Color Signal

The clearest difference is in-app purchases: ISC NIRScan at none against Color Signal's 5. ISC NIRScan also leads on ads (none vs shown) and iOS requirement (12.0 vs 17.0). Color Signal's advantage is update cadence (daily vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Color Signal sells 5 in-app purchases, starting at $0.99 per month. ISC NIRScan asks for nothing beyond the download.

ISC NIRScan ships an update every 2 months, Color Signal daily. The most recent releases landed on September 15, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | ISC NIRScan | Color Signal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Daily** |
| Size | 38 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [He Yi Hsieh](https://appshunter.io/developer/1081259026) | [kentaro hirahara](https://appshunter.io/developer/1895391848) |

## What reviewers say

### ISC NIRScan

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Color Signal

[App page](https://appshunter.io/ios/app/color-signal-full-screen/id6794909280)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads – Monthly | $0.99 | per month |
| Support S | $0.49 | one-time |
| Remove Ads | $5.99 | one-time |
| Support M | $5.99 | one-time |
| Support L | $59.99 | one-time |


## Frequently asked questions

### Is ISC NIRScan free?

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

### Is Color Signal free?

Color Signal is free to download, with in-app purchases available.

### Do ISC NIRScan or Color Signal have ads?

Color Signal shows ads; ISC NIRScan does not.

### Which is updated more often, ISC NIRScan or Color Signal?

ISC NIRScan ships an update every 2 months, and Color Signal daily. Most recently, ISC NIRScan was updated on September 15, 2026 and Color Signal on September 12, 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.*