# THERMO vs GDDTracker

The clearest difference is in-app purchases: THERMO at none against GDDTracker's 2. GDDTracker's advantage is update cadence (every 2 days vs every 7 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. GDDTracker sells 2 in-app purchases, starting at $0.99 per month. THERMO asks for nothing beyond the download.

THERMO ships an update every 7 months, GDDTracker every 2 days. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | THERMO | GDDTracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (13 ratings)](https://appshunter.io/ios/app/gddtracker/id6752981800/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 days** |
| Monetization | **Free** | Subscription |
| Size | 11 MB | 15 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [DATA INFORMATION SERVICES GmbH](https://appshunter.io/developer/950690317) | [Kirk Faris](https://appshunter.io/developer/1842027731) |

## What reviewers say

### THERMO

[App page](https://appshunter.io/ios/app/thermo-connect/id1186298709)

Monitor your home's condition remotely with wireless sensors and a gateway. Receive instant push notifications for malfunctions like open doors, power outages, or temperature issues, preventing potential damage. Easy setup allows for quick monitoring of your property from anywhere.

**Highlights:** Remote home condition monitoring, Wireless sensor integration, Instant push notifications, Easy 5-step installation, Customizable alarm limits, Expandable sensor system, IoT platform integration

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

**In-app purchases:** none


### GDDTracker

[App page](https://appshunter.io/ios/app/gddtracker/id6752981800)

This app calculates Growing Degree Days (GDD) using hyper-local weather data to help you precisely time lawn care applications. It also logs applications, provides smart reminders, and includes profiles for over 50 grass varieties.

**Highlights:** Growing Degree Day (GDD) calculation and forecasting, Application logging with product details and notes, Smart reminders based on GDD, days, or soil temp, 50+ grass variety profiles, Rate calculator for product amounts, Multiple lawn management, CSV/PDF record export

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual | $9.99 | per year |


## Frequently asked questions

### Is THERMO free?

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

### Is GDDTracker free?

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

### Do THERMO or GDDTracker have ads?

Neither THERMO nor GDDTracker shows ads.

### Which is updated more often, THERMO or GDDTracker?

THERMO ships an update every 7 months, and GDDTracker every 2 days. Most recently, THERMO was updated on November 6, 2026 and GDDTracker on October 30, 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.*