# K vs Perfect TRAINING

The clearest difference is in-app purchases: K at none against Perfect TRAINING's 3. Perfect TRAINING's advantage is update cadence (every 3 weeks vs every 3 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Perfect TRAINING sells 3 in-app purchases, starting at $39.90 per month. K asks for nothing beyond the download.

K ships an update every 3 months, Perfect TRAINING every 3 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | K | Perfect TRAINING |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 93 MB | 97 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Nicola Eusebi](https://appshunter.io/developer/737311863) | [NIL Plus d.o.o.](https://appshunter.io/developer/1854399448) |

## What reviewers say

### K

[App page](https://appshunter.io/ios/app/k-50-live/id1445003358)

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

**In-app purchases:** none


### Perfect TRAINING

[App page](https://appshunter.io/ios/app/perfect-training/id6755528130)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Perfect TRAINING Monthly | $39.90 | per month |
| Perfect TRAINING Yearly | $299.99 | per year |
| Perfect TRAINING Lifetime | $599.00 | one-time |


## Frequently asked questions

### Is K free?

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

### Is Perfect TRAINING free?

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

### Do K or Perfect TRAINING have ads?

Neither K nor Perfect TRAINING shows ads.

### Which is updated more often, K or Perfect TRAINING?

K ships an update every 3 months, and Perfect TRAINING every 3 weeks. Most recently, K was updated on October 26, 2026 and Perfect TRAINING on October 25, 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.*