# Firstgrin vs CORTHEA

The clearest difference is in-app purchases: CORTHEA at none against Firstgrin's 8. CORTHEA also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Firstgrin sells 8 in-app purchases, starting at $4.99 per month. CORTHEA asks for nothing beyond the download.

Firstgrin ships an update every 2 months, CORTHEA every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Firstgrin | CORTHEA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (26 ratings)](https://appshunter.io/ios/app/firstgrin/id6445939045/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 100 MB | 393 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Firstgrin LLC](https://appshunter.io/developer/1615635695) | [CORTHEA GmbH](https://appshunter.io/developer/1626472737) |

## What reviewers say

### Firstgrin

[App page](https://appshunter.io/ios/app/firstgrin/id6445939045)

This app guides users on a journey to better oral health through habit tracking, expert advice, and a dentist locator. It also provides an emergency guide for dental trauma and interactive learning modules for all ages.

**Highlights:** Brushing habit tracking, Dental professional insights, Nearby dentist locator, Digital dental trauma guide, Interactive oral care learning

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $9.99 | per year |
| Insurance Yearly | $9.99 | per year |
| Yearly Premium | $19.99 | per year |
| 50 Chat Credits | $2.99 | one-time |
| 150 Chat Credits | $7.99 | one-time |
| 500 Chat Credits | $19.99 | one-time |


### CORTHEA

[App page](https://appshunter.io/ios/app/corthea/id6755426399)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Firstgrin free?

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

### Is CORTHEA free?

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

### Do Firstgrin or CORTHEA have ads?

Firstgrin shows ads; CORTHEA does not.

### Which is updated more often, Firstgrin or CORTHEA?

Firstgrin ships an update every 2 months, and CORTHEA every 3 weeks. Most recently, Firstgrin was updated on November 3, 2026 and CORTHEA on November 5, 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.*