# PPFD METER vs Grow Guide

The clearest difference is review sentiment: Grow Guide at 97% against PPFD METER's 53%. Grow Guide also leads on ads (none vs shown) and rating (4.9 vs 4.6). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. PPFD METER sells 3 in-app purchases, starting at $1.99 per month and Grow Guide sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Grow Guide holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 125 and 126 respectively. Written reviews point the same way: 53% of PPFD METER's written reviews are positive against 97% of Grow Guide's.

PPFD METER ships an update every 3 weeks, Grow Guide weekly. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PPFD METER | Grow Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (125 ratings)](https://appshunter.io/ios/app/ppfd-meter-grow-light-meter/id6479329051/reviews) | **[4.9 (126 ratings)](https://appshunter.io/ios/app/grow-guide/id6637720578/reviews)** |
| Number of ratings | 125 | **126** |
| Positive reviews | 52.6% of reviews | **96.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 46 MB | 85 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Candas Pamukcu](https://appshunter.io/developer/1735587895) | [phannafest llc](https://appshunter.io/developer/1209901791) |

## What reviewers say

### 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 |


### Grow Guide

[App page](https://appshunter.io/ios/app/grow-guide/id6637720578)

This app helps users track their cannabis grows from seed to harvest. It offers AI-powered advice, a community forum for knowledge sharing, and professional tools like a VPD calculator and light meter. Create time-lapse videos of your plants and learn from experienced cultivators.

**Highlights:** Daily grow tracking journal, AI-powered plant advice, Time-lapse video creation, Active grower community, Professional growing tools (VPD, light meter), Nutrient and environment tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grow Guide Pro | $5.99 | per month |
| Grow Guide Pro | $39.99 | per year |
| Grow Guide Pro (LTD) | $149.00 | one-time |


## Frequently asked questions

### Is PPFD METER free?

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

### Is Grow Guide free?

Grow Guide is free to download, with in-app purchases available.

### Which has better reviews, PPFD METER or Grow Guide?

Grow Guide is rated higher. PPFD METER averages 4.6 out of 5 from 125 ratings, while Grow Guide averages 4.9 from 126 ratings.

### Do PPFD METER or Grow Guide have ads?

PPFD METER shows ads; Grow Guide does not.

### Which is updated more often, PPFD METER or Grow Guide?

PPFD METER ships an update every 3 weeks, and Grow Guide weekly. Most recently, PPFD METER was updated on October 10, 2026 and Grow Guide on October 15, 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.*