# PPFD METER vs IR Sync

The clearest difference is in-app purchases: IR Sync at none against PPFD METER's 3. IR Sync also leads on ads (none vs shown) and rating (5.0 vs 4.6). PPFD METER's advantage is ratings volume (125 vs 1). 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. IR Sync asks for nothing beyond the download.

IR Sync holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: PPFD METER has 125 ratings behind it against 1, so its average is the more settled of the two.

PPFD METER ships an update every 3 weeks, IR Sync fortnightly. The most recent releases landed on October 10, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PPFD METER | IR Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (125 ratings)](https://appshunter.io/ios/app/ppfd-meter-grow-light-meter/id6479329051/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ir-sync/id6771472994/reviews)** |
| Number of ratings | **125** | 1 |
| Positive reviews | 52.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 46 MB | 54 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Candas Pamukcu](https://appshunter.io/developer/1735587895) | [SoCal Dab Tools, LLC](https://appshunter.io/developer/1891379874) |

## 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 |


### IR Sync

[App page](https://appshunter.io/ios/app/ir-sync/id6771472994)

This app connects to precision temperature monitors via Bluetooth to display real-time readings and control device settings. Save custom presets, set smart alerts, and review session history. It also features a QR scanner for loading manufacturer profiles.

**Highlights:** Real-time temperature monitoring, Customizable presets, Smart alerts and notifications, Session history logging, QR scanner for profiles, Device settings synchronization

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

**In-app purchases:** none


## Frequently asked questions

### Is PPFD METER free?

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

### Is IR Sync free?

IR Sync is free to download, with no in-app purchases.

### Which has better reviews, PPFD METER or IR Sync?

IR Sync is rated higher. PPFD METER averages 4.6 out of 5 from 125 ratings, while IR Sync averages 5.0 from 1 ratings.

### Do PPFD METER or IR Sync have ads?

PPFD METER shows ads; IR Sync does not.

### Which is updated more often, PPFD METER or IR Sync?

PPFD METER ships an update every 3 weeks, and IR Sync fortnightly. Most recently, PPFD METER was updated on October 10, 2026 and IR Sync on October 1, 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.*