# NDCalc2 vs Luma Calc

The clearest difference is price: Luma Calc at Free against NDCalc2's $0.99. NDCalc2's advantage is iOS requirement (7.0 vs 13.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Luma Calc is free to download; NDCalc2 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

NDCalc2 ships an update every 10 months, Luma Calc every 7 months. The most recent releases landed on November 11, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | NDCalc2 | Luma Calc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/ndcalc2/id822835884/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 47.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 7 months** |
| Monetization | Paid | — |
| Size | 20 MB | 19 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Boris Nienke](https://appshunter.io/developer/300699195) | [yeongsu son](https://appshunter.io/developer/1795476431) |

## What reviewers say

### NDCalc2

[App page](https://appshunter.io/ios/app/ndcalc2/id822835884)

Calculate correct exposure times when using ND filters for long exposures. Easily manage your filter collection, add custom filters, and switch between single and multi-select modes for stacking.

**Highlights:** Calculate exposure time with ND filters, Supports iPhone 5/s/c screens, Multi-Select Mode for filter stacking, Add custom ND filters, Delete and reorder filters, Countdown timer for long exposures

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

**In-app purchases:** none


### Luma Calc

[App page](https://appshunter.io/ios/app/luma-calc/id6741770226)

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

**In-app purchases:** none


## Frequently asked questions

### Is NDCalc2 free?

NDCalc2 costs $0.99, with no in-app purchases.

### Is Luma Calc free?

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

### Do NDCalc2 or Luma Calc have ads?

Neither NDCalc2 nor Luma Calc shows ads.

### Which is updated more often, NDCalc2 or Luma Calc?

NDCalc2 ships an update every 10 months, and Luma Calc every 7 months. Most recently, NDCalc2 was updated on November 11, 2026 and Luma Calc on November 4, 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.*