Comparison

Theia Legacy vs PPFD METER

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Theia Legacy

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
Read full description

With the Theia app you can set up and control your Scynce LED lights Intensity Control the energy your light is emitting from 0-100% with dim-to-zero capabilities Spectrum Design your own custom lighting experience with complete control over which color channels are on at what percentage Scheduling Set the on/off time and add in features like a sunset & sunrise ramp Recipes Create and upload your own personal lighting recipes to give your plants exactly what they need Control Connect wirelessly through Bluetooth or our mesh network to gain complete control over 1 or a group of many lights.

About

PPFD METER

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
Read full description

Perfect for both seasoned gardeners and beginners, PPFD Meter sets itself apart from standard grow light meter apps with its comprehensive features and intuitive design. Using your phone's built-in sensors or the acclaimed UNI-T UT383 BT sensor via Bluetooth, PPFD Meter provides precise and reliable light measurements. This accuracy is essential for understanding and optimizing the light your plants receive, ensuring their health and growth. PPFD Meter is more than a light measurement tool; it's a guide to understanding your plants' needs. It converts LUX readings into PPFD (Photosynthetic Photon Flux Density) and DLI (Daily Light Integral), providing critical insights for your lighting setup. Customize up to five different settings profiles for various environments or growth stages, making your plant care as unique as your garden. Advanced Light Mapping and Analysis Step into a new era of light management with PPFD Meter's advanced light mapping capabilities. Our exclusive PAR and DLI Maps feature offers a vivid, detailed representation of light distribution across your grow area, enabling precise adjustments for optimal plant growth. But that's just the beginning: In-Depth Light Analysis: Measure light uniformity to ensure even plant growth, and evaluate your setup's PPF (Photosynthetic Photon Flux) to understand the total light output. Efficiency and Consumption Insights: Assess the efficiency of your lighting system in converting energy into usable light. Track the daily total energy consumption to manage your energy usage and environmental impact effectively. Comprehensive DLI Tracking: Monitor the Daily Light Integral, a key factor in regulating plant health and growth cycles, ensuring your plants receive the right amount of light each day. These advanced features make PPFD Meter not just an app, but a vital partner in your indoor gardening journey. It’s a leap forward from typical grow light meter apps, offering a depth of analysis and customization that truly enhances your plant care experience. Download PPFD Meter today and embark on a journey of precision and expertise in plant care. Your plants will thrive like never before! Privacy Policy: https://www.ppfd.app/pp Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Theia Legacy4 screens
PPFD METER4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Theia Legacy versus PPFD METER: the parameters behind the verdict, then further details
ParameterTheia LegacyPPFD METER
PriceFreeFree
Rating3.8 (4 ratings)4.6 (130 ratings) — better
Positive reviews—52.6% of reviews
Number of ratings4130 — better
Update frequencyEvery 7 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better18.0
Further details — not scored
Size79 MB46 MB
Age rating4+4+
DeveloperIllum HorticultureCandas Pamukcu

Customer experience

Theia Legacy

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

PPFD METER

All ratings129 ratings
Positive89.9%
Neutral3.9%
Negative6.2%
Written reviews19 reviews
Positive52.6%
Neutral10.5%
Negative36.8%

In-app purchases

None

Theia Legacy

No in-app purchases

3 purchases

PPFD METER

Subscriptions2
  • Premium$1.991 Month
  • Premium Plus$2.991 Month
One-time1
  • Remove Ads$29.99

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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