Comet Book vs HistoryTablet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Comet Book
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.
- Comet viewing direction and elevation
- Real-time celestial object tracking
- 3D Solar System mode
- Visualize comet and planet motion
- Observing site guidance
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The Comet Book app clearly shows when Comets can be viewed and in which direction. The direction and elevation of a Comet can change noticeably in a day due to its fast apparent motion. The moon and a bright planet may be convenient as a guide to find the comet though they have large apparent motion, too. This app determines where Comet is in the sky when it becomes visible at your observing site. You can easily start your observation of a Comet by using Comet Book as a guide to the direction and elevation of the comet. In addition, the new “3D Solar System seen from Space” mode allows you to view the motion of Comets and planets turning around the sun. Please take a look the comet’s movement around our solar system.
HistoryTablet
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.
- 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
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HistoryTablet is a timeline creator. Quickly put together a timeline by editing simple text file of Dates, Title, Events, and Names. Features : Saves data on iCloud to be sync'ed between Apple devices Works on iPhone and iPad with data sync'ed seemlessly by iCould Events and People and Periods are separated in their own block. People database accepts a small square image of a person. Text based import/export to quickly build a complex timeline Simplified data entry below simple text file can be imported to generate timeline which can easily expand to 1000 entries throughout human written history. Tablet zooms in and out to accommodate larger database. Media Band is added for large photo url. Tablet-Title by HistoryTablet Event 1776/7/4 Independence Day
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Comet Book | HistoryTablet |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 5.0 (3 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 54.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 10 MB | 3 MB |
| Age rating | 9+ | 4+ |
| Developer | Vixen Co.,Ltd. | Jonathan Kim |
Customer experience
Comet Book
HistoryTablet
In-app purchases
Comet Book
No in-app purchases
HistoryTablet
No in-app purchases
Questions
Is Comet Book free?
Is HistoryTablet free?
Which has better reviews, Comet Book or HistoryTablet?
Do Comet Book or HistoryTablet have ads?
Which is updated more often, Comet Book or HistoryTablet?
Other comparisons
