# TM+ Pro vs VPD Chart

The clearest difference is rating: VPD Chart at 4.5 against TM+ Pro's 3.1. VPD Chart also leads on review sentiment (74% vs 32%) and update cadence (every 3 weeks vs every 2 months). TM+ Pro's advantage is in-app purchases (none vs 2) and ratings volume (97 vs 30). On price, ads and device support there is nothing between them.

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

VPD Chart holds the better App Store score, 4.5 against 3.1. Both are backed by a comparable volume of ratings — 97 and 30 respectively. Written reviews point the same way: 32% of TM+ Pro's written reviews are positive against 74% of VPD Chart's.

TM+ Pro ships an update every 2 months, VPD Chart every 3 weeks. Both last shipped on September 22, 2026.

## The numbers

| Metric | TM+ Pro | VPD Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (97 ratings)](https://appshunter.io/ios/app/tm-plus-pro/id1619222131/reviews) | **[4.5 (30 ratings)](https://appshunter.io/ios/app/vpd-chart/id6470015847/reviews)** |
| Number of ratings | **97** | 30 |
| Positive reviews | 32.4% of reviews | **73.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 122 MB | 49 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [TrolMaster Agro Instruments Co., Limited](https://appshunter.io/developer/1619222133) | [INNOVO DEV S.R.L.](https://appshunter.io/developer/1814828527) |

## What reviewers say

### TM+ Pro

[App page](https://appshunter.io/ios/app/tm-plus-pro/id1619222131)

Remotely monitor and control horticulture automation systems for your growth facilities. Features a new UI, historical charts, customizable device displays, and a logbook for tracking plant data. Connect with a community of growers and access support resources.

**Highlights:** Remote access to control systems, Historical data charting, Customizable device naming and photos, Plant growth logbook, Grower community and forum, Controller sharing with authorization

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

**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 TM+ Pro free?

TM+ Pro 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, TM+ Pro or VPD Chart?

VPD Chart is rated higher. TM+ Pro averages 3.1 out of 5 from 97 ratings, while VPD Chart averages 4.5 from 30 ratings.

### Do TM+ Pro or VPD Chart have ads?

Neither TM+ Pro nor VPD Chart shows ads.

### Which is updated more often, TM+ Pro or VPD Chart?

TM+ Pro ships an update every 2 months, and VPD Chart every 3 weeks. Most recently, TM+ Pro was updated on September 22, 2026 and VPD Chart 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.*