# NSP32 nanoLambda Spectrometer vs Calefact

NSP32 nanoLambda Spectrometer and Calefact are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

NSP32 nanoLambda Spectrometer ships an update every 2 months, Calefact every 3 months. The most recent releases landed on December 13, 2025 and October 25, 2026 respectively.

## The numbers

| Metric | NSP32 nanoLambda Spectrometer | Calefact |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 22 MB | 12 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [nanoLambda](https://appshunter.io/developer/1848242561) | [Calefact Limited](https://appshunter.io/developer/1829616586) |

## What reviewers say

### NSP32 nanoLambda Spectrometer

[App page](https://appshunter.io/ios/app/nsp32-nanolambda-spectrometer/id1480194984)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calefact

[App page](https://appshunter.io/ios/app/calefact/id6499568921)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NSP32 nanoLambda Spectrometer free?

NSP32 nanoLambda Spectrometer is free to download, with no in-app purchases.

### Is Calefact free?

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

### Do NSP32 nanoLambda Spectrometer or Calefact have ads?

Neither NSP32 nanoLambda Spectrometer nor Calefact shows ads.

### Which is updated more often, NSP32 nanoLambda Spectrometer or Calefact?

NSP32 nanoLambda Spectrometer ships an update every 2 months, and Calefact every 3 months. Most recently, NSP32 nanoLambda Spectrometer was updated on December 13, 2025 and Calefact on October 25, 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.*