# Subway3D vs Teacher AI

The clearest difference is in-app purchases: Subway3D at none against Teacher AI's 9. Teacher AI's advantage is device support and iOS requirement (16.4 vs 18.0). On price there is nothing between them.

Both are free to download. Teacher AI sells 9 in-app purchases, starting at $16.00 per month. Subway3D asks for nothing beyond the download.

## The numbers

| Metric | Subway3D | Teacher AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (268 ratings)](https://appshunter.io/ios/app/teacher-ai-language-practice/id6502562481/reviews)** |
| Number of ratings | — | **268** |
| Positive reviews | — | 46.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 2 weeks |
| Monetization | — | Subscription |
| Size | 22 MB | 109 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Geoffrey Domm](https://appshunter.io/developer/373378724) | [Teacher AI](https://appshunter.io/developer/1737421132) |

## What reviewers say

### Subway3D

[App page](https://appshunter.io/ios/app/subway3d/id6446181722)

**In-app purchases:** none


### Teacher AI

[App page](https://appshunter.io/ios/app/teacher-ai-language-practice/id6502562481)

This app focuses on developing speaking confidence through natural AI-powered conversations, moving beyond traditional grammar exercises. It helps users activate vocabulary and build fluency by speaking daily in a stress-free environment. Track your progress based on words actively spoken and build consistent speaking habits.

**Highlights:** AI-powered natural conversations, Speaking-first approach, Stress-free practice environment, Track spoken words and progress, Build daily speaking habits, Practice multiple languages

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Teacher AI - 1 month | $16.00 | per month |
| Monthly $25.00 | $24.99 | per month |
| Teacher AI - 1 month | $24.99 | per month |
| Teacher AI - 1 month | $24.99 | per month |
| Teacher AI - 6 months | $67.00 | per 6 months |
| Teacher AI - 1 year | $97.00 | per year |
| Teacher AI - 6 months | $106.99 | per 6 months |
| Teacher AI - 6 months | $106.99 | per 6 months |
| Teacher AI - 1 year | $146.99 | per year |

**What reviewers like**

- 🗣️ Realistic conversation practice
- 💡 Real-time correction and feedback
- 🌍 Supports multiple languages
- 🎧 Natural-sounding voices
- 🚶 Hands-free mode for convenience

**What reviewers complain about**

- 💸 Expensive subscription cost
- ❓ Confusing for beginners
- 🐛 Frequent bugs and glitches
- ⏳ Long response loading times
- 🚫 Lack of clear instructions

**Reported bugs**

- App logs out after a few weeks
- Password reset link not received
- App glitches and spins, becoming unusable
- Low volume for some voices
- App crashes or freezes

**Requested features**

- Add Haitian Creole language
- Option to turn off AI ending every response with a question
- Grammar-focused chat sessions
- More variety and creativity in topic suggestions
- Ability to store user interactions on a personal server


## Frequently asked questions

### Is Subway3D free?

Subway3D is free to download, with no in-app purchases.

### Is Teacher AI free?

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

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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.*