# LensFactor vs Green

The clearest difference is price: Green at Free against LensFactor's $1.99. LensFactor's advantage is update cadence (every 24 months vs every 49 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Green is free to download; LensFactor costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LensFactor ships an update every 24 months, Green every 49 months. Both last shipped on September 21, 2026.

## The numbers

| Metric | LensFactor | Green |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/lensfactor/id370376269/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 24 months** | Every 49 months |
| Monetization | Paid | — |
| Size | 1 MB | 7 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bart van Stiphout](https://appshunter.io/developer/368100168) | [ELC lighting bv](https://appshunter.io/developer/942270014) |

## What reviewers say

### LensFactor

[App page](https://appshunter.io/ios/app/lensfactor/id370376269)

This app helps calculate lens factors, screen sizes, and projector distances based on known variables. It's a utility for professionals or enthusiasts needing precise measurements for display setups.

**Highlights:** Calculate lens factor, Calculate screen size, Calculate projector distance, Input screen size and projector distance, Input lens factor and projector distance, Input lens factor and screen size

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

**In-app purchases:** none


### Green

[App page](https://appshunter.io/ios/app/green-go-control-remote/id1497722398)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LensFactor free?

LensFactor costs $1.99, with no in-app purchases.

### Is Green free?

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

### Do LensFactor or Green have ads?

Neither LensFactor nor Green shows ads.

### Which is updated more often, LensFactor or Green?

LensFactor ships an update every 24 months, and Green every 49 months. Most recently, LensFactor was updated on September 21, 2026 and Green on September 21, 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.*