# PhotoFolia — Estimate plant health

> Estimate plant health (iPhone/iPad app by Miguel Garvie.)

- Source: https://appshunter.io/ios/app/photofolia/id6463719098 (this page in markdown: same URL + `.md`)
- Developer: [Miguel Garvie](https://appshunter.io/developer/1545547691)
- Category: Utilities, Food & Drink
- Price: Free
- Age rating: 4+
- Requires: iOS 14.6 · 10 MB
- Languages: American English
- Released: 2023-10-03
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/photofolia/id6463719098/reviews.md

## What is PhotoFolia?

Plant life depends upon photosynthesis, which starts with absorption of light energy by the green pigment chlorophyll. The chlorophyll concentration in a leaf can be inferred from its colour.  

PhotoFolia uses a colour standard and proprietary algorithms to provide a calibrated measurement of leaf spectral reflectance, from which chlorophyll and nitrogen concentration as well as SPAD value can be inferred. Photofolia allows users to select the particular plant species to give the best possible meausrment.  Results are stored in the cloud, and can be viewed on a web browser at https://colourworker.com/apps/photofolia/showmeasurements


## Version history (last 5 releases)

### 2.3 — 2025-12-29

This version uses the QR finder pattern 1-1-3-1-1 on the colour standard for more robust detection.

### 2.1 — 2025-10-21

Better QR detection allowing measurements to be taken with and without new QR standard.

### 1.9 — 2024-06-11

The QR pattern detectors are 2-1-2-1-2 .

### 1.8 — 2024-05-17

Bugfix to colour standard detection client code

### 1.6 — 2024-05-14

The app now dynamically searches for the colour standard within the client.

## Apps similar to PhotoFolia

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Agri Calculator](https://appshunter.io/ios/app/agri-calculator/id6504129837) | — | Free | Utilities |
| [Gridwatch](https://appshunter.io/ios/app/gridwatch/id1553702520) | — | Free | Utilities |
| [NL Connect](https://appshunter.io/ios/app/nl-connect/id1535496065) | 3.0 (7) | Free | Utilities |
| [UNI-T Smart Measure](https://appshunter.io/ios/app/uni-t-smart-measure/id1587547004) | 3.0 (3) | Free | Utilities |
| [Abaqus Field](https://appshunter.io/ios/app/abaqus-field/id1570790105) | — | Free | Utilities |
| [KitLegit](https://appshunter.io/ios/app/kitlegit/id6459883332) | 3.7 (3) | Free | Utilities |

## More apps by Miguel Garvie

- [CoverMatch](https://appshunter.io/ios/app/covermatch/id1545547689)
- [ColourWorker](https://appshunter.io/ios/app/colourworker/id1561852001)

All apps by Miguel Garvie: https://appshunter.io/developer/1545547691

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*