# GrowFlux vs VPD Chart

GrowFlux and VPD Chart both sit at 4.4 stars, but that hides the real split: 74% of VPD Chart's written reviews are positive against 0% of GrowFlux's. VPD Chart also leads on ratings volume (30 vs 5). GrowFlux's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 15.1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. VPD Chart sells 2 in-app purchases, starting at $3.99 per month. GrowFlux asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.4 for GrowFlux against 4.5 for VPD Chart. That said, the two scores are not equally well evidenced: VPD Chart has 30 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 0% of GrowFlux's written reviews are positive against 74% of VPD Chart's.

GrowFlux ships an update every 5 weeks, VPD Chart every 3 weeks. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | GrowFlux | VPD Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (5 ratings)](https://appshunter.io/ios/app/growflux/id1443967063/reviews) | **[4.5 (30 ratings)](https://appshunter.io/ios/app/vpd-chart/id6470015847/reviews)** |
| Number of ratings | 5 | **30** |
| Positive reviews | 0.0% of reviews | **73.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 14 MB | 49 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GrowFlux Inc.](https://appshunter.io/developer/1443967062) | [INNOVO DEV S.R.L.](https://appshunter.io/developer/1814828527) |

## What reviewers say

### GrowFlux

[App page](https://appshunter.io/ios/app/growflux/id1443967063)

Control and monitor your greenhouse with this app. Create custom light formulas with timed set points and manage up to 1,000 lights per zone. Monitor sensors for optimal growing conditions.

**Highlights:** Zoning capabilities, Light formula creation, Sensor monitoring, Access point management, Control multiple lights per zone

**Features:** macOS Compatibility

**In-app purchases:** none


### VPD Chart

[App page](https://appshunter.io/ios/app/vpd-chart/id6470015847)

This app calculates Vapor Pressure Deficit (VPD) using air temperature, relative humidity, and canopy temperature. It offers real-time charting, sensor integration, and educational tools to understand plant growth environments. Organize data by zones and visualize dew point areas.

**Highlights:** VPD calculation, Interactive VPD chart, Sensor integration, Zone organization, Dew point visualization, Grow Timeline

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VPD Chart Plus (monthly) | $3.99 | per month |
| VPD Chart Plus (annual) | $29.99 | per year |


## Frequently asked questions

### Is GrowFlux free?

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

### Is VPD Chart free?

VPD Chart is free to download, with in-app purchases available.

### Which has better reviews, GrowFlux or VPD Chart?

VPD Chart is rated higher. GrowFlux averages 4.4 out of 5 from 5 ratings, while VPD Chart averages 4.5 from 30 ratings.

### Do GrowFlux or VPD Chart have ads?

Neither GrowFlux nor VPD Chart shows ads.

### Which is updated more often, GrowFlux or VPD Chart?

GrowFlux ships an update every 5 weeks, and VPD Chart every 3 weeks. Most recently, GrowFlux was updated on October 2, 2026 and VPD Chart on October 14, 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.*