# CalcuLight vs Glitchforge

The clearest difference is in-app purchases: Glitchforge at none against CalcuLight's 2. Glitchforge also leads on update cadence (every 8 days vs every 4 weeks). CalcuLight's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price and ads there is nothing between them.

Both are free to download. CalcuLight sells 2 in-app purchases, starting at $0.99 per month. Glitchforge asks for nothing beyond the download.

CalcuLight ships an update every 4 weeks, Glitchforge every 8 days. The most recent releases landed on October 7, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | CalcuLight | Glitchforge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calculight/id6758964459/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 8 days** |
| Monetization | Freemium | — |
| Size | 40 MB | 150 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Li Fan](https://appshunter.io/developer/1876047115) | [Green Rose Systems, LLC](https://appshunter.io/developer/6783546702) |

## What reviewers say

### CalcuLight

[App page](https://appshunter.io/ios/app/calculight/id6758964459)

This app provides advanced light metering for film photographers, offering multiple metering modes and exposure control options. It helps users achieve precise exposures for their shots, with features like Zone System display and a log book for tracking. A free version is available, with an optional Pro upgrade for more advanced tools.

**Highlights:** Center Weighted metering, 3D Matrix metering, Spot metering (Pro), Calculated metering (Pro), Shutter Priority metering, Aperture Priority metering (Pro), Zone System overlay (Pro), Log book with GPS (Pro)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcuLight | $0.99 | per month |
| CalcuLight | $14.99 | one-time |


### Glitchforge

[App page](https://appshunter.io/ios/app/glitchforge-datamosh-studio/id6794509122)

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

**In-app purchases:** none


## Frequently asked questions

### Is CalcuLight free?

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

### Is Glitchforge free?

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

### Do CalcuLight or Glitchforge have ads?

Neither CalcuLight nor Glitchforge shows ads.

### Which is updated more often, CalcuLight or Glitchforge?

CalcuLight ships an update every 4 weeks, and Glitchforge every 8 days. Most recently, CalcuLight was updated on October 7, 2026 and Glitchforge on October 3, 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.*