# GroundGlass vs Optaxis

The clearest difference is in-app purchases: GroundGlass at none against Optaxis's 2. Optaxis's advantage is update cadence (every 4 days vs every 10 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Optaxis sells 2 in-app purchases, starting at $5.99 per month. GroundGlass asks for nothing beyond the download.

GroundGlass ships an update every 10 days, Optaxis every 4 days. The most recent releases landed on September 26, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | GroundGlass | Optaxis |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | Free | — |
| Size | 16 MB | 123 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [存滨 崔](https://appshunter.io/developer/1809703940) | [XIAO MIN NI](https://appshunter.io/developer/1887064548) |

## What reviewers say

### GroundGlass

[App page](https://appshunter.io/ios/app/groundglass/id6747068863)

This app helps large format photographers meticulously log every detail of their shoots. It automatically calculates settings, supports Zone System metering, and manages film workflows. Export records, analyze trends, and access a comprehensive equipment database.

**Highlights:** Complete shooting records, Zone System metering, iCloud Sync, Film workflow management, Record templates, PDF export, Statistics & analysis

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

**In-app purchases:** none


### Optaxis

[App page](https://appshunter.io/ios/app/optaxis/id6760964267)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $5.99 | per month |
| Yearly | $49.99 | per year |


## Frequently asked questions

### Is GroundGlass free?

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

### Is Optaxis free?

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

### Do GroundGlass or Optaxis have ads?

Neither GroundGlass nor Optaxis shows ads.

### Which is updated more often, GroundGlass or Optaxis?

GroundGlass ships an update every 10 days, and Optaxis every 4 days. Most recently, GroundGlass was updated on September 26, 2026 and Optaxis on September 16, 2026.

---

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