# DiemdanhAI vs ClassFast

The clearest difference is in-app purchases: DiemdanhAI at none against ClassFast's 3. ClassFast's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ClassFast sells 3 in-app purchases, starting at $1.99 per month. DiemdanhAI asks for nothing beyond the download.

DiemdanhAI ships an update every 3 months, ClassFast every 2 weeks. The most recent releases landed on October 14, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | DiemdanhAI | ClassFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/classfast-class-attendance/id6755885720/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 23 MB | 74 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Khuong Tuan Tran](https://appshunter.io/developer/1655851413) | [Vien Tran Ngoc](https://appshunter.io/developer/1644084520) |

## What reviewers say

### DiemdanhAI

[App page](https://appshunter.io/ios/app/diemdanhai/id6739444980)

**Features:** macOS Compatibility

**In-app purchases:** none


### ClassFast

[App page](https://appshunter.io/ios/app/classfast-class-attendance/id6755885720)

This app digitizes class management for educators, handling attendance, tuition fees, and parent communication. It automates tasks like fee calculation and receipt generation, saving time for teachers. Parents can track student progress and receive notifications directly.

**Highlights:** Quick attendance tracking, Automated tuition management, Parent communication portal, Class and student profiles, Income and expense tracking, Automated notifications, Cloud sync and dark mode

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gói hằng tháng | $1.99 | per month |
| Gói 6 tháng | $7.99 | per 6 months |
| Gói 1 năm | $12.99 | per year |


## Frequently asked questions

### Is DiemdanhAI free?

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

### Is ClassFast free?

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

### Do DiemdanhAI or ClassFast have ads?

Neither DiemdanhAI nor ClassFast shows ads.

### Which is updated more often, DiemdanhAI or ClassFast?

DiemdanhAI ships an update every 3 months, and ClassFast every 2 weeks. Most recently, DiemdanhAI was updated on October 14, 2026 and ClassFast on October 26, 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.*