# Comet Book vs HistoryTablet

The clearest difference is review sentiment: Comet Book at 55% against HistoryTablet's 0%. Comet Book also leads on price (Free vs $4.99) and rating (5.0 vs 1.0). HistoryTablet's advantage is update cadence (every 3 weeks vs every 6 months). On ads, in-app purchases and device support there is nothing between them.

Comet Book is free to download; HistoryTablet costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Comet Book holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews point the same way: 55% of Comet Book's written reviews are positive against 0% of HistoryTablet's.

Comet Book ships an update every 6 months, HistoryTablet every 3 weeks. The most recent releases landed on October 23, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Comet Book | HistoryTablet |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/comet-book/id604782335/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/historytablet/id1621355916/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | **54.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 10 MB | 3 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Vixen Co.,Ltd.](https://appshunter.io/developer/536188843) | [Jonathan Kim](https://appshunter.io/developer/1621355918) |

## What reviewers say

### Comet Book

[App page](https://appshunter.io/ios/app/comet-book/id604782335)

Discover and track comets with this educational app. It provides real-time direction and elevation data to help you locate celestial objects in the night sky. Explore the solar system in 3D and visualize the movement of comets and planets.

**Highlights:** Comet viewing direction and elevation, Real-time celestial object tracking, 3D Solar System mode, Visualize comet and planet motion, Observing site guidance

**In-app purchases:** none


### HistoryTablet

[App page](https://appshunter.io/ios/app/historytablet/id1621355916)

Create detailed historical timelines with dates, titles, and events. Easily import and export data via text files, and sync across Apple devices using iCloud. Supports images and media URLs for a richer historical record.

**Highlights:** Text-based import/export, iCloud sync across Apple devices, Separated blocks for events, people, and periods, Image support for people database, Media band for photo URLs, Zoomable timeline for large datasets

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

**In-app purchases:** none


## Frequently asked questions

### Is Comet Book free?

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

### Is HistoryTablet free?

HistoryTablet costs $4.99, with no in-app purchases.

### Which has better reviews, Comet Book or HistoryTablet?

Comet Book is rated higher. Comet Book averages 5.0 out of 5 from 3 ratings, while HistoryTablet averages 1.0 from 1 ratings.

### Do Comet Book or HistoryTablet have ads?

Neither Comet Book nor HistoryTablet shows ads.

### Which is updated more often, Comet Book or HistoryTablet?

Comet Book ships an update every 6 months, and HistoryTablet every 3 weeks. Most recently, Comet Book was updated on October 23, 2026 and HistoryTablet on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*