# Knot 3D vs TensorFlow Practice Test

The clearest difference is ads: TensorFlow Practice Test at none against Knot 3D's shown. TensorFlow Practice Test also leads on update cadence (every 4 weeks vs every 4 months). Knot 3D's advantage is iOS requirement (13.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Knot 3D sells 2 one-off in-app purchases and TensorFlow Practice Test sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Knot 3D ships an update every 4 months, TensorFlow Practice Test every 4 weeks. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Knot 3D | TensorFlow Practice Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.7 (15 ratings)](https://appshunter.io/ios/app/knot-3d-learn-to-tie-knots/id1533648624/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 40 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitin Katrodiya](https://appshunter.io/developer/1530680301) | [Thomas Baric](https://appshunter.io/developer/1872894014) |

## What reviewers say

### Knot 3D

[App page](https://appshunter.io/ios/app/knot-3d-learn-to-tie-knots/id1533648624)

Learn to tie a wide variety of useful and decorative knots with animated 3D instructions. This guide covers knots for boating, camping, climbing, fishing, household tasks, and more, making it a handy reference for various activities.

**Highlights:** Animated 3D knot tying instructions, Categorized knot types (boating, fishing, climbing, etc.), Reference for practical and decorative knots, Useful for outdoor activities and household chores, Step-by-step visual guidance

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Knot | $4.99 | one-time |
| Remove Ads | $9.99 | one-time |


### TensorFlow Practice Test

[App page](https://appshunter.io/ios/app/tensorflow-practice-test/id6781809553)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Linux / DevOps Access Bundle | $6.99 | per month |
| AI / Machine Learning Access Bundle | $6.99 | per month |
| TensorFlow Developer Pro | $3.99 | one-time |


## Frequently asked questions

### Is Knot 3D free?

Knot 3D is free to download, with in-app purchases available.

### Is TensorFlow Practice Test free?

TensorFlow Practice Test is free to download, with in-app purchases available.

### Do Knot 3D or TensorFlow Practice Test have ads?

Knot 3D shows ads; TensorFlow Practice Test does not.

### Which is updated more often, Knot 3D or TensorFlow Practice Test?

Knot 3D ships an update every 4 months, and TensorFlow Practice Test every 4 weeks. Most recently, Knot 3D was updated on October 21, 2026 and TensorFlow Practice Test on October 24, 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.*