# STPRO vs Light Meter LuMe

The clearest difference is in-app purchases: STPRO at none against Light Meter LuMe's 2. STPRO also leads on iOS requirement (8.0 vs 16.0). Light Meter LuMe's advantage is update cadence (every 5 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Light Meter LuMe sells 1 one-off in-app purchase. STPRO asks for nothing beyond the download.

STPRO ships an update monthly, Light Meter LuMe every 5 days. The most recent releases landed on September 23, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | STPRO | Light Meter LuMe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (17 ratings)](https://appshunter.io/ios/app/light-meter-lume/id6772063294/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 16 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KERTEC EURL](https://appshunter.io/developer/1133036613) | [Contrast Studio](https://appshunter.io/developer/6772063296) |

## What reviewers say

### STPRO

[App page](https://appshunter.io/ios/app/stpro/id1274832928)

**Features:** macOS Compatibility

**In-app purchases:** none


### Light Meter LuMe

[App page](https://appshunter.io/ios/app/light-meter-lume/id6772063294)

This app acts as a professional light meter and exposure calculator for film photographers. It offers various metering modes, reciprocity correction for different film stocks, and depth of field calculations. It aims to replace multiple handheld tools with a single, convenient app.

**Highlights:** Multiple metering modes (Matrix, Center-weighted, Spot, Zone System), Multi-point spot metering with contrast evaluation, Reciprocity correction for various film stocks, Depth of field and hyperfocal distance calculator, Flash guide number calculator, Live exposure tools including histogram and clipping warnings

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LuMe Pro Lifetime | $6.99 | one-time |


## Frequently asked questions

### Is STPRO free?

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

### Is Light Meter LuMe free?

Light Meter LuMe is free to download, with in-app purchases available.

### Do STPRO or Light Meter LuMe have ads?

Neither STPRO nor Light Meter LuMe shows ads.

### Which is updated more often, STPRO or Light Meter LuMe?

STPRO ships an update monthly, and Light Meter LuMe every 5 days. Most recently, STPRO was updated on September 23, 2026 and Light Meter LuMe on October 17, 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.*