# NBTC e vs Skybook E

The clearest difference is update cadence: NBTC e at every 4 months against Skybook E's every 30 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.

NBTC e ships an update every 4 months, Skybook E every 30 months. The most recent releases landed on September 14, 2026 and March 16, 2026 respectively.

## The numbers

| Metric | NBTC e | Skybook E |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 30 months |
| Size | 21 MB | 12 MB |
| Requires iOS | 12.1 | 12.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 17+ |
| Developer | [Office of The National Broadcasting and Telecommunications Commission](https://appshunter.io/developer/721507053) | [STAQ Technologies Co., Ltd.](https://appshunter.io/developer/506659247) |

## What reviewers say

### NBTC e

[App page](https://appshunter.io/ios/app/nbtc-e-library/id955374020)

**Features:** macOS Compatibility

**In-app purchases:** none


### Skybook E

[App page](https://appshunter.io/ios/app/skybook-e/id1599065699)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NBTC e free?

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

### Is Skybook E free?

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

### Do NBTC e or Skybook E have ads?

Neither NBTC e nor Skybook E shows ads.

### Which is updated more often, NBTC e or Skybook E?

NBTC e ships an update every 4 months, and Skybook E every 30 months. Most recently, NBTC e was updated on September 14, 2026 and Skybook E on March 16, 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.*