# Tac · Intl School Hub vs Einstein Study AI Coach

The clearest difference is in-app purchases: Tac · Intl School Hub at none against Einstein Study AI Coach's 2. Tac · Intl School Hub also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Einstein Study AI Coach sells 2 in-app purchases, starting at $5.99 per month. Tac · Intl School Hub asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Tac · Intl School Hub | Einstein Study AI Coach |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Size | 77 MB | 18 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Siheng Education Technology Co., Ltd.](https://appshunter.io/developer/1822200212) | [Daniel Plata](https://appshunter.io/developer/1467546479) |

## What reviewers say

### Tac · Intl School Hub

[App page](https://appshunter.io/ios/app/tac-intl-school-hub/id6747653357)

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

**In-app purchases:** none


### Einstein Study AI Coach

[App page](https://appshunter.io/ios/app/einstein-study-ai-coach/id6754023929)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly | $5.99 | per month |
| Premium annual | $19.99 | per year |


## Frequently asked questions

### Is Tac · Intl School Hub free?

Tac · Intl School Hub is free to download, with no in-app purchases.

### Is Einstein Study AI Coach free?

Einstein Study AI Coach is free to download, with in-app purchases available.

### Do Tac · Intl School Hub or Einstein Study AI Coach have ads?

Neither Tac · Intl School Hub nor Einstein Study AI Coach shows ads.

### Which is updated more often, Tac · Intl School Hub or Einstein Study AI Coach?

Tac · Intl School Hub ships an update every 3 days, and Einstein Study AI Coach every 3 days. Most recently, Tac · Intl School Hub was updated on October 25, 2026 and Einstein Study AI Coach on October 28, 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.*