# Zerobooks vs JTR Calcs

The clearest difference is price: JTR Calcs at Free against Zerobooks's $19.99. Zerobooks's advantage is iOS requirement (11.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

JTR Calcs is free to download; Zerobooks costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Zerobooks | JTR Calcs |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | **[3.2 (25 ratings)](https://appshunter.io/ios/app/zerobooks-pro/id6449901775/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 9 months |
| Monetization | Paid | — |
| Size | 56 MB | 1 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Rebecca Hustin](https://appshunter.io/developer/1644671209) | [Rex Harris](https://appshunter.io/developer/1709578578) |

## What reviewers say

### Zerobooks

[App page](https://appshunter.io/ios/app/zerobooks-pro/id6449901775)

This app serves as a database for LN (Light Novel) entries. It allows users to access and manage information related to light novels.

**Highlights:** LN Database, Information Access, Entry Management, Light Novel Tracking

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

**In-app purchases:** none


### JTR Calcs

[App page](https://appshunter.io/ios/app/jtr-calcs/id6468682017)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zerobooks free?

Zerobooks costs $19.99, with no in-app purchases.

### Is JTR Calcs free?

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

### Do Zerobooks or JTR Calcs have ads?

Neither Zerobooks nor JTR Calcs shows ads.

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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.*