# Marion SD vs Central Tech

The clearest difference is update cadence: Central Tech at every 2 months against Marion SD's every 11 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Marion SD ships an update every 11 months, Central Tech every 2 months. The most recent releases landed on October 11, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Marion SD | Central Tech |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Size | 144 MB | 144 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Marion Public Schools](https://appshunter.io/developer/1596514136) | [Central Tech](https://appshunter.io/developer/957796275) |

## What reviewers say

### Marion SD

[App page](https://appshunter.io/ios/app/marion-sd/id1596514134)

**In-app purchases:** none


### Central Tech

[App page](https://appshunter.io/ios/app/central-tech/id6775887704)

**In-app purchases:** none


## Frequently asked questions

### Is Marion SD free?

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

### Is Central Tech free?

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

### Do Marion SD or Central Tech have ads?

Neither Marion SD nor Central Tech shows ads.

### Which is updated more often, Marion SD or Central Tech?

Marion SD ships an update every 11 months, and Central Tech every 2 months. Most recently, Marion SD was updated on October 11, 2026 and Central Tech on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*