# Stops+ vs Luma Calc

The clearest difference is in-app purchases: Luma Calc at none against Stops+'s 5. Luma Calc also leads on iOS requirement (13.0 vs 18.0). Stops+'s advantage is update cadence (every 6 weeks vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. Stops+ sells 5 in-app purchases, starting at $1.99 per month. Luma Calc asks for nothing beyond the download.

Stops+ ships an update every 6 weeks, Luma Calc every 7 months. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Stops+ | Luma Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/stops-plus/id6538719303/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | Freemium | — |
| Size | 30 MB | 19 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Purpl Pro](https://appshunter.io/developer/1662309039) | [yeongsu son](https://appshunter.io/developer/1795476431) |

## What reviewers say

### Stops+

[App page](https://appshunter.io/ios/app/stops-plus/id6538719303)

This app precisely calculates exposure compensation for aperture, FPS, shutter speed, and ISO with fine increments. It helps artists and technologists avoid guesswork on set or in labs, offering features like DIFF Mode for instant attribute differences and filter compensation.

**Highlights:** Precise exposure compensation calculation, Adjustments in 1/32 stop increments, DIFF Mode for instant attribute differences, Lens filter compensation (up to 2 filters), Customizable parameter settings, ETTR/ETTL ISO calculation

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus | $1.99 | per month |
| Plus | $5.99 | per year |
| Lab Super Precision | $4.99 | one-time |
| Exposure Compensate | $4.99 | one-time |
| Plus Lifetime | $24.99 | one-time |


### 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 Stops+ free?

Stops+ is free to download, with in-app purchases available.

### Is Luma Calc free?

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

### Do Stops+ or Luma Calc have ads?

Neither Stops+ nor Luma Calc shows ads.

### Which is updated more often, Stops+ or Luma Calc?

Stops+ ships an update every 6 weeks, and Luma Calc every 7 months. Most recently, Stops+ was updated on June 1, 2026 and Luma Calc on September 21, 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.*