# NDC Library vs CT for Open Community

The clearest difference is update cadence: CT for Open Community at every 3 weeks against NDC Library's every 2 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.

NDC Library ships an update every 2 months, CT for Open Community every 3 weeks. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | NDC Library | CT for Open Community |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 24 MB | 72 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Refread Solutions Private Limited](https://appshunter.io/developer/1495104123) | [Lookings Soft Pvt.Ltd](https://appshunter.io/developer/1546861502) |

## What reviewers say

### NDC Library

[App page](https://appshunter.io/ios/app/ndc-library/id1498650441)

**Features:** macOS Compatibility

**In-app purchases:** none


### CT for Open Community

[App page](https://appshunter.io/ios/app/ct-for-open-community/id1546861500)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NDC Library free?

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

### Is CT for Open Community free?

CT for Open Community is free to download, with no in-app purchases.

### Do NDC Library or CT for Open Community have ads?

Neither NDC Library nor CT for Open Community shows ads.

### Which is updated more often, NDC Library or CT for Open Community?

NDC Library ships an update every 2 months, and CT for Open Community every 3 weeks. Most recently, NDC Library was updated on October 7, 2026 and CT for Open Community on October 19, 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.*