# Grainium vs Light Meter LuMe

The clearest difference is update cadence: Grainium at every 2 days against Light Meter LuMe's every 5 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Grainium sells 2 in-app purchases, starting at $2.99 per month and Light Meter LuMe sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Grainium ships an update every 2 days, Light Meter LuMe every 5 days. The most recent releases landed on September 9, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Grainium | 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 | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 5 days |
| Monetization | — | Free with in-app purchases |
| Size | 60 MB | 16 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Gareth Lee Joseph](https://appshunter.io/developer/1896396853) | [Contrast Studio](https://appshunter.io/developer/6772063296) |

## What reviewers say

### Grainium

[App page](https://appshunter.io/ios/app/grainium/id6767138368)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grainium Pro · Monthly | $2.99 | per month |
| Grainium Pro · Annual | $29.99 | per year |


### 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 Grainium free?

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

### Is Light Meter LuMe free?

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

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

Neither Grainium nor Light Meter LuMe shows ads.

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

Grainium ships an update every 2 days, and Light Meter LuMe every 5 days. Most recently, Grainium was updated on September 9, 2026 and Light Meter LuMe on September 26, 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.*