# RDIAS vs Attendize

The clearest difference is in-app purchases: RDIAS at none against Attendize's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Attendize sells 3 in-app purchases, starting at $3.99 per month. RDIAS asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RDIAS | Attendize |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/attendize/id6760735854/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 45 MB | 39 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [nishi kant](https://appshunter.io/developer/1474235760) | [LINDA JAMIL MANSOUR](https://appshunter.io/developer/1858804617) |

## What reviewers say

### RDIAS

[App page](https://appshunter.io/ios/app/rdias/id1474235761)

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

**In-app purchases:** none


### Attendize

[App page](https://appshunter.io/ios/app/attendize/id6760735854)

This app helps students track their class attendance, providing insights into their standing and potential absences. It offers features like fast check-ins, buffer calculations, and pattern analysis to stay motivated and informed about academic progress. Core tracking is free, with optional premium features available via subscription.

**Highlights:** Class schedule setup, One-tap attendance marking, Attendance percentage tracking, Absence buffer calculation, End-of-term forecasting, Attendance pattern analysis, Motivational badges and ranks

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $3.99 | per month |
| Premium (Semi-Annual) | $17.99 | per 6 months |
| Premium (Annual) | $29.99 | per year |


## Frequently asked questions

### Is RDIAS free?

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

### Is Attendize free?

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

### Do RDIAS or Attendize have ads?

Neither RDIAS nor Attendize shows ads.

### Which is updated more often, RDIAS or Attendize?

RDIAS ships an update monthly, and Attendize monthly. Most recently, RDIAS was updated on October 10, 2026 and Attendize on October 13, 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.*