# iENV vs PPFD METER

The clearest difference is rating: PPFD METER at 4.6 against iENV's 3.1. PPFD METER also leads on review sentiment (53% vs 24%) and ratings volume (118 vs 7). iENV's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, update cadence 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. iENV asks for nothing beyond the download.

PPFD METER holds the better App Store score, 4.6 against 3.1. That said, the two scores are not equally well evidenced: PPFD METER has 118 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 24% of iENV's written reviews are positive against 53% of PPFD METER's.

iENV ships an update monthly, PPFD METER every 3 weeks. Both last shipped on September 22, 2026.

## The numbers

| Metric | iENV | PPFD METER |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (7 ratings)](https://appshunter.io/ios/app/ienv/id1260827700/reviews) | **[4.6 (118 ratings)](https://appshunter.io/ios/app/ppfd-meter-grow-light-meter/id6479329051/reviews)** |
| Number of ratings | 7 | **118** |
| Positive reviews | 24.2% of reviews | **52.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 70 MB | 43 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [UNI-TREND TECHNOLOGY (CHINA) CO.,LTD.](https://appshunter.io/developer/1207185875) | [Candas Pamukcu](https://appshunter.io/developer/1735587895) |

## What reviewers say

### iENV

[App page](https://appshunter.io/ios/app/ienv/id1260827700)

This utility app connects UNI-T environmental meters to your smartphone via Bluetooth. It displays and records real-time data for temperature, humidity, noise, wind speed, light intensity, and rotation speed from compatible UNI-T devices.

**Highlights:** Bluetooth connectivity to UNI-T meters, Real-time data display, Data recording capabilities, Supports multiple environmental parameters, Compatible with various UNI-T meter models

**Features:** macOS Compatibility

**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 iENV free?

iENV 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, iENV or PPFD METER?

PPFD METER is rated higher. iENV averages 3.1 out of 5 from 7 ratings, while PPFD METER averages 4.6 from 118 ratings.

### Do iENV or PPFD METER have ads?

PPFD METER shows ads; iENV does not.

### Which is updated more often, iENV or PPFD METER?

iENV ships an update monthly, and PPFD METER every 3 weeks. Most recently, iENV was updated on September 22, 2026 and PPFD METER on September 22, 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.*