# Theia Legacy vs PPFD METER

The clearest difference is rating: PPFD METER at 4.6 against Theia Legacy's 3.8. PPFD METER also leads on update cadence (every 3 weeks vs every 7 months) and ratings volume (130 vs 4). Theia Legacy's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. PPFD METER sells 3 in-app purchases, starting at $1.99 per month. Theia Legacy asks for nothing beyond the download.

PPFD METER holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: PPFD METER has 130 ratings behind it against 4, so its average is the more settled of the two.

Theia Legacy ships an update every 7 months, PPFD METER every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Theia Legacy | PPFD METER |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/theia-legacy/id1624637084/reviews) | **[4.6 (130 ratings)](https://appshunter.io/ios/app/ppfd-meter-grow-light-meter/id6479329051/reviews)** |
| Number of ratings | 4 | **130** |
| Positive reviews | — | 52.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 79 MB | 46 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Illum Horticulture](https://appshunter.io/developer/1575946647) | [Candas Pamukcu](https://appshunter.io/developer/1735587895) |

## What reviewers say

### Theia Legacy

[App page](https://appshunter.io/ios/app/theia-legacy/id1624637084)

Control your Scynce LED grow lights with custom intensity, spectrum, and scheduling. Design personalized lighting recipes and manage one or multiple lights wirelessly via Bluetooth or mesh network.

**Highlights:** Adjust light intensity (0-100%), Customize color spectrum, Set on/off schedules, Create custom lighting recipes, Wireless control via Bluetooth/mesh, Manage groups of lights

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

**In-app purchases:** none


### PPFD METER

[App page](https://appshunter.io/ios/app/ppfd-meter-grow-light-meter/id6479329051)

This app measures light intensity for plants, converting LUX to PPFD and DLI. It offers advanced light mapping, uniformity analysis, and efficiency insights to optimize plant growth. Customize profiles for different environments and growth stages.

**Highlights:** LUX, PPFD, DLI, and PAR measurements, Light mapping and distribution analysis, Uniformity and PPF evaluation, Energy efficiency and consumption tracking, Customizable setting profiles, Bluetooth sensor integration

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | per month |
| Premium Plus | $2.99 | per month |
| Remove Ads | $29.99 | one-time |


## Frequently asked questions

### Is Theia Legacy free?

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

### Is PPFD METER free?

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

### Which has better reviews, Theia Legacy or PPFD METER?

PPFD METER is rated higher. Theia Legacy averages 3.8 out of 5 from 4 ratings, while PPFD METER averages 4.6 from 130 ratings.

### Do Theia Legacy or PPFD METER have ads?

PPFD METER shows ads; Theia Legacy does not.

### Which is updated more often, Theia Legacy or PPFD METER?

Theia Legacy ships an update every 7 months, and PPFD METER every 3 weeks. Most recently, Theia Legacy was updated on November 3, 2026 and PPFD METER on November 4, 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.*