# IU School System vs tdc.

IU School System and tdc. are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

IU School System ships an update monthly, tdc. every 3 weeks. The most recent releases landed on September 11, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | IU School System | tdc. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 53 MB | 89 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Athar Akbar](https://appshunter.io/developer/1711608523) | [Abdul Majid Shah Bukhari](https://appshunter.io/developer/1896112171) |

## What reviewers say

### IU School System

[App page](https://appshunter.io/ios/app/iu-school-system/id6752768682)

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

**In-app purchases:** none


### tdc.

[App page](https://appshunter.io/ios/app/tdc/id6765877675)

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

**In-app purchases:** none


## Frequently asked questions

### Is IU School System free?

IU School System is free to download, with no in-app purchases.

### Is tdc. free?

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

### Do IU School System or tdc. have ads?

Neither IU School System nor tdc. shows ads.

### Which is updated more often, IU School System or tdc.?

IU School System ships an update monthly, and tdc. every 3 weeks. Most recently, IU School System was updated on September 11, 2026 and tdc. on September 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.*