# VPD Chart vs Grow Guide

The clearest difference is rating: Grow Guide at 4.9 against VPD Chart's 4.5. Grow Guide also leads on review sentiment (97% vs 74%) and update cadence (weekly vs every 3 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. VPD Chart sells 2 in-app purchases, starting at $3.99 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 4.5. Both are backed by a comparable volume of ratings — 30 and 121 respectively. Written reviews point the same way: 74% of VPD Chart's written reviews are positive against 97% of Grow Guide's.

VPD Chart ships an update every 3 weeks, Grow Guide weekly. The most recent releases landed on September 22, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | VPD Chart | Grow Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (30 ratings)](https://appshunter.io/ios/app/vpd-chart/id6470015847/reviews) | **[4.9 (121 ratings)](https://appshunter.io/ios/app/grow-guide/id6637720578/reviews)** |
| Number of ratings | 30 | **121** |
| Positive reviews | 73.7% of reviews | **96.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 49 MB | 85 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +17 |
| Developer | [INNOVO DEV S.R.L.](https://appshunter.io/developer/1814828527) | [phannafest llc](https://appshunter.io/developer/1209901791) |

## What reviewers say

### 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 |


### 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 VPD Chart free?

VPD Chart 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, VPD Chart or Grow Guide?

Grow Guide is rated higher. VPD Chart averages 4.5 out of 5 from 30 ratings, while Grow Guide averages 4.9 from 121 ratings.

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

Neither VPD Chart nor Grow Guide shows ads.

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

VPD Chart ships an update every 3 weeks, and Grow Guide weekly. Most recently, VPD Chart was updated on September 22, 2026 and Grow Guide on September 23, 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.*