# LDX Scanner vs PQ Calc

The clearest difference is price: LDX Scanner at Free against PQ Calc's $4.99. PQ Calc's advantage is chart position (#198 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

LDX Scanner is free to download; PQ Calc costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LDX Scanner ships an update every 21 months, PQ Calc every 22 months. The most recent releases landed on September 9, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | LDX Scanner | PQ Calc |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pq-calc/id1541419476/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 21 months** | Every 22 months |
| Monetization | — | Paid |
| Best chart rank | — | **#198** |
| Size | 1 MB | 1 MB |
| Requires iOS | **14.0** | 14.2 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grass Valley USA, LLC](https://appshunter.io/developer/1502979668) | [Avical](https://appshunter.io/developer/1534335247) |

## What reviewers say

### LDX Scanner

[App page](https://appshunter.io/ios/app/ldx-scanner/id1539005893)

**In-app purchases:** none


### PQ Calc

[App page](https://appshunter.io/ios/app/pq-calc/id1541419476)

**Currently charting:** #198 Top Paid · Photo & Video (US App Store)

Easily convert luminance levels (nits) to digital values and vice versa using the SMPTE ST 2084 (PQ) electro-optical transfer function. Supports various bit depths and ranges for professional video workflows.

**Highlights:** Bi-directional conversion, Luminance (nit) to digital level, Digital level to luminance (nit), Supports Full, SMPTE, SDI-Full ranges, Calculations in float, percent, 8-16bit

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LDX Scanner free?

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

### Is PQ Calc free?

PQ Calc costs $4.99, with no in-app purchases.

### Do LDX Scanner or PQ Calc have ads?

Neither LDX Scanner nor PQ Calc shows ads.

### Which is updated more often, LDX Scanner or PQ Calc?

LDX Scanner ships an update every 21 months, and PQ Calc every 22 months. Most recently, LDX Scanner was updated on September 9, 2026 and PQ Calc on September 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*