# Qalculator vs uSpectrumX BLE

The clearest difference is price: uSpectrumX BLE at Free against Qalculator's $2.99. uSpectrumX BLE also leads on iOS requirement (9.0 vs 15.6). Qalculator's advantage is update cadence (every 4 months vs every 14 months). On ads, in-app purchases and device support there is nothing between them.

uSpectrumX BLE is free to download; Qalculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Qalculator ships an update every 4 months, uSpectrumX BLE every 14 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Qalculator | uSpectrumX BLE |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/qalculator/id639592437/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 14 months |
| Monetization | Paid | — |
| Size | 2 MB | 33 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [QConcept GmbH & Co. KG](https://appshunter.io/developer/639592440) | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) |

## What reviewers say

### Qalculator

[App page](https://appshunter.io/ios/app/qalculator/id639592437)

This app provides specialized calculation tools for media professionals in film, TV, theatre, and events. It offers utilities for lighting, projection, cameras, audio, and more, simplifying complex industry tasks.

**Highlights:** Lighting beam calculations, Projection tools, Camera distance and focal length calculations, Audio delay and phase offset calculations, Display size and bandwidth calculations, Tap BPM and DIP switch utilities

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

**In-app purchases:** none


### uSpectrumX BLE

[App page](https://appshunter.io/ios/app/uspectrumx-ble/id1556396560)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Qalculator free?

Qalculator costs $2.99, with no in-app purchases.

### Is uSpectrumX BLE free?

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

### Do Qalculator or uSpectrumX BLE have ads?

Neither Qalculator nor uSpectrumX BLE shows ads.

### Which is updated more often, Qalculator or uSpectrumX BLE?

Qalculator ships an update every 4 months, and uSpectrumX BLE every 14 months. Most recently, Qalculator was updated on November 1, 2026 and uSpectrumX BLE on November 3, 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.*