# Pulse Grow vs VPD Chart

The clearest difference is rating: VPD Chart at 4.5 against Pulse Grow's 3.9. VPD Chart also leads on review sentiment (74% vs 46%). Pulse Grow's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.1). On price, ratings volume, 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. Pulse Grow asks for nothing beyond the download.

VPD Chart holds the better App Store score, 4.5 against 3.9. Both are backed by a comparable volume of ratings — 29 and 30 respectively. Written reviews point the same way: 46% of Pulse Grow's written reviews are positive against 74% of VPD Chart's.

Pulse Grow ships an update fortnightly, VPD Chart every 3 weeks. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Pulse Grow | VPD Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (29 ratings)](https://appshunter.io/ios/app/pulse-grow/id1497259672/reviews) | **[4.5 (30 ratings)](https://appshunter.io/ios/app/vpd-chart/id6470015847/reviews)** |
| Number of ratings | 29 | **30** |
| Positive reviews | 46.2% of reviews | **73.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 34 MB | 49 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pulse Labs, Incorporated](https://appshunter.io/developer/1483297180) | [INNOVO DEV S.R.L.](https://appshunter.io/developer/1814828527) |

## What reviewers say

### Pulse Grow

[App page](https://appshunter.io/ios/app/pulse-grow/id1497259672)

Monitor your grow environment remotely, tracking temperature, humidity, and light. Receive custom alerts and log your progress with integrated journaling to optimize your plant growth.

**Highlights:** Remote environmental monitoring, Temperature and RH tracking, Light monitoring, VPD calculation, Customizable alerts, Integrated journaling

**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 Pulse Grow free?

Pulse Grow 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, Pulse Grow or VPD Chart?

VPD Chart is rated higher. Pulse Grow averages 3.9 out of 5 from 29 ratings, while VPD Chart averages 4.5 from 30 ratings.

### Do Pulse Grow or VPD Chart have ads?

Neither Pulse Grow nor VPD Chart shows ads.

### Which is updated more often, Pulse Grow or VPD Chart?

Pulse Grow ships an update fortnightly, and VPD Chart every 3 weeks. Most recently, Pulse Grow was updated on October 10, 2026 and VPD Chart on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*