# NCKU Library vs SDC

NCKU Library and SDC 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.

NCKU Library ships an update every 3 months, SDC every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | NCKU Library | SDC |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 10 MB | 8 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NATIONAL CHENG KUNG UNIVERSITY](https://appshunter.io/developer/601920267) | [Chung-Ming Huang](https://appshunter.io/developer/1003733181) |

## What reviewers say

### NCKU Library

[App page](https://appshunter.io/ios/app/ncku-library/id1080535737)

Access National Cheng Kung University Library resources on your mobile device. Search the catalog, check item availability and location, renew loans, and find library hours and news.

**Highlights:** Search library catalog, Check item availability and location, Renew checkouts and request holds, View library hours and contacts, See venue occupancy status, Access library news and events

**In-app purchases:** none


### SDC

[App page](https://appshunter.io/ios/app/sdc-deh-lite/id1552530246)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NCKU Library free?

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

### Is SDC free?

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

### Do NCKU Library or SDC have ads?

Neither NCKU Library nor SDC shows ads.

### Which is updated more often, NCKU Library or SDC?

NCKU Library ships an update every 3 months, and SDC every 2 months. Most recently, NCKU Library was updated on November 2, 2026 and SDC on November 3, 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.*