# Focal Length Calculator vs CamPlot Director's Viewfinder

The clearest difference is price: CamPlot Director's Viewfinder at Free against Focal Length Calculator's $2.99. CamPlot Director's Viewfinder also leads on update cadence (every 2 days vs every 38 months). Focal Length Calculator's advantage is in-app purchases (none vs 4) and iOS requirement (12.0 vs 15.0). On ads and device support there is nothing between them.

CamPlot Director's Viewfinder is free to download; Focal Length Calculator costs $2.99 up front. CamPlot Director's Viewfinder sells 4 in-app purchases, starting at $3.99 per month. Focal Length Calculator asks for nothing beyond the download.

Focal Length Calculator ships an update every 38 months, CamPlot Director's Viewfinder every 2 days. The most recent releases landed on September 11, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Focal Length Calculator | CamPlot Director's Viewfinder |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (12 ratings)](https://appshunter.io/ios/app/camplot-directors-viewfinder/id6795573318/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 7 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heng Jia Liang](https://appshunter.io/developer/1532000635) | [Romany Films Inc.](https://appshunter.io/developer/6794152159) |

## What reviewers say

### Focal Length Calculator

[App page](https://appshunter.io/ios/app/focal-length-calculator/id6443980209)

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

**In-app purchases:** none


### CamPlot Director's Viewfinder

[App page](https://appshunter.io/ios/app/camplot-directors-viewfinder/id6795573318)

Simulate professional cinema cameras and lenses on your iPhone. Accurately view shots with real sensor geometry, a vast lens kit, and live LUT grading. Scout locations with sun path and LiDAR distance.

**Highlights:** Simulates real cinema camera bodies and sensors, Extensive lens kit with primes and zooms, Live LUT grading with 200+ cinema looks, Sun path visualization for location scouting, LiDAR distance measurement on Pro iPhones, Organized library of all captures and scans, Exportable shot lists with QR codes

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CamPlot View+ Monthly | $3.99 | per month |
| CamPlot Creator Monthly | $4.99 | per month |
| CamPlot View Plus Annual | $29.99 | per year |
| CamPlot Creator Annual | $49.99 | per year |


## Frequently asked questions

### Is Focal Length Calculator free?

Focal Length Calculator costs $2.99, with no in-app purchases.

### Is CamPlot Director's Viewfinder free?

CamPlot Director's Viewfinder is free to download, with in-app purchases available.

### Do Focal Length Calculator or CamPlot Director's Viewfinder have ads?

Neither Focal Length Calculator nor CamPlot Director's Viewfinder shows ads.

### Which is updated more often, Focal Length Calculator or CamPlot Director's Viewfinder?

Focal Length Calculator ships an update every 38 months, and CamPlot Director's Viewfinder every 2 days. Most recently, Focal Length Calculator was updated on September 11, 2026 and CamPlot Director's Viewfinder on September 9, 2026.

---

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