# CalcuLight vs Chromaform

The clearest difference is update cadence: Chromaform at every 9 days against CalcuLight's every 4 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CalcuLight sells 2 in-app purchases, starting at $0.99 per month and Chromaform sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

CalcuLight ships an update every 4 weeks, Chromaform every 9 days. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CalcuLight | Chromaform |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calculight/id6758964459/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 9 days** |
| Monetization | Freemium | — |
| Size | 40 MB | 35 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Li Fan](https://appshunter.io/developer/1876047115) | [Chromaform, Inc.](https://appshunter.io/developer/6783229906) |

## 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 |


### Chromaform

[App page](https://appshunter.io/ios/app/chromaform/id6771851788)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chromaform Pro | $2.99 | per month |
| Chromaform Pro | $14.99 | per year |
| Chromaform Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is CalcuLight free?

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

### Is Chromaform free?

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

### Do CalcuLight or Chromaform have ads?

Neither CalcuLight nor Chromaform shows ads.

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

CalcuLight ships an update every 4 weeks, and Chromaform every 9 days. Most recently, CalcuLight was updated on October 7, 2026 and Chromaform on October 24, 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.*