# PowerkVA vs NLC eBook Reader

The clearest difference is price: NLC eBook Reader at Free against PowerkVA's $1.99. NLC eBook Reader also leads on update cadence (every 5 weeks vs every 94 months). PowerkVA's advantage is chart position (#187 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

NLC eBook Reader is free to download; PowerkVA costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PowerkVA ships an update every 94 months, NLC eBook Reader every 5 weeks. The most recent releases landed on November 11, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PowerkVA | NLC eBook Reader |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.6 (10 ratings)](https://appshunter.io/ios/app/powerkva/id778275984/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 94 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Best chart rank | **#187** | — |
| Size | 3 MB | 76 MB |
| Requires iOS | 14.1 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Manuel Olivera](https://appshunter.io/developer/778275987) | [Quanta Services](https://appshunter.io/developer/1449726206) |

## What reviewers say

### PowerkVA

[App page](https://appshunter.io/ios/app/powerkva/id778275984)

**Currently charting:** #187 Top Paid · Education (US App Store)

This app simplifies electrical transformer calculations using formulas and drawings. It offers standard transformer sizes and voltages with an intuitive interface for easy value selection.

**Highlights:** Electrical transformer computation, Formulas and drawings, Standard transformer sizes, Standard voltages, Simple value selection

**Features:** macOS Compatibility

**In-app purchases:** none


### NLC eBook Reader

[App page](https://appshunter.io/ios/app/nlc-ebook-reader/id6752949222)

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

**In-app purchases:** none


## Frequently asked questions

### Is PowerkVA free?

PowerkVA costs $1.99, with no in-app purchases.

### Is NLC eBook Reader free?

NLC eBook Reader is free to download, with no in-app purchases.

### Do PowerkVA or NLC eBook Reader have ads?

Neither PowerkVA nor NLC eBook Reader shows ads.

### Which is updated more often, PowerkVA or NLC eBook Reader?

PowerkVA ships an update every 94 months, and NLC eBook Reader every 5 weeks. Most recently, PowerkVA was updated on November 11, 2026 and NLC eBook Reader on October 28, 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.*