# STSK9 vs K9 Optima

The clearest difference is review sentiment: STSK9 at 100% against K9 Optima's 0%. STSK9 also leads on rating (5.0 vs 3.0) and ratings volume (8 vs 2). K9 Optima's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. STSK9 sells 1 one-off in-app purchase. K9 Optima asks for nothing beyond the download.

STSK9 holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 8 and 2 respectively. Written reviews point the same way: 100% of STSK9's written reviews are positive against 0% of K9 Optima's.

STSK9 ships an update every 2 weeks, K9 Optima fortnightly. The most recent releases landed on September 12, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | STSK9 | K9 Optima |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/stsk9/id6468565276/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/k9-optima/id6475994808/reviews) |
| Number of ratings | **8** | 2 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 49 MB | 49 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [STSK9](https://appshunter.io/developer/1710109116) | [K9 Optima](https://appshunter.io/developer/1725527918) |

## What reviewers say

### STSK9

[App page](https://appshunter.io/ios/app/stsk9/id6468565276)

Access specialized online dog training courses and all your training videos in one convenient app. Receive updates and easily find your favorite content.

**Highlights:** Online dog training courses, Access all training videos, Push notifications for updates, Password-free video access, Save favorite posts

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Puppy University Program | $299.00 | one-time |


### K9 Optima

[App page](https://appshunter.io/ios/app/k9-optima/id6475994808)

Access expert-designed courses, engaging webinars, and on-demand support for dog training and behavior challenges. This app provides a community, video library, and push notifications for the latest updates, all from the K9 Optima owner.

**Highlights:** Exclusive community access, Expertly designed courses, Engaging webinars, On-demand support, Video library, Push notifications, Favorite posts saving

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is STSK9 free?

STSK9 is free to download, with in-app purchases available.

### Is K9 Optima free?

K9 Optima is free to download, with no in-app purchases.

### Which has better reviews, STSK9 or K9 Optima?

STSK9 is rated higher. STSK9 averages 5.0 out of 5 from 8 ratings, while K9 Optima averages 3.0 from 2 ratings.

### Do STSK9 or K9 Optima have ads?

Neither STSK9 nor K9 Optima shows ads.

### Which is updated more often, STSK9 or K9 Optima?

STSK9 ships an update every 2 weeks, and K9 Optima fortnightly. Most recently, STSK9 was updated on September 12, 2026 and K9 Optima on September 15, 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.*