Parallel Chronology vs Epoch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Parallel Chronology
Explore historical events and fictional timelines side-by-side. Compare information across different categories and time periods, from the dawn of the universe to the present and beyond. Discover new insights by juxtaposing diverse data points on an infinitely scrolling timeline.
- Side-by-side information display
- Story units for comparative analysis
- Infinite scroll timeline (99.9 billion BC to 99.9 billion AD)
- Tool for historical discovery
- Supports custom fictional data
- Links to Wikipedia for details
- Universal device support (iPhone/iPad)
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## Parallel comparison ## You can display various informations with time attributes unit of year side by side, regardless of a specific category such as Japanese history or world history. ## Story Unit ## Multiple data are displayed together in a unit "Story", so you can easily compare informations along with different viewpoints. ## Almost infinite scroll ## You can display Informations from before the birth of the universe (13.8 billion years ago) to the present on the same timeline. It is almost infinite scroll by practical usage. It is about a range of 99.9 billion BC to 99.9 billion AD. ## Tool for new discovery ## Comparing historical figures of various countries, or history of natural disasters and wars, which may deepen your understanding of history or make new discoveries. ## It's OK on any data ## You can create Story and datas of it. It's OK not only data on history, but fictional datas such as in novels, movies, and completely original datas. ex. * History of characters in SF novels * Genealogy of ancestors * Data for memorization of historical terms ## Easy to check detail informations ## Each data on the chronology is linked to page of Wikipedia, so if its title exists, you can check the detail information immediately. This is the same even if it is data created by yourself. ## Universal devices ## This app supports universal devices, so you can use comfortably with either iPhone of iPad. In addition, you can rotate either horizontally or vertically. So you can rotate it according to your preference, for example in case you want to display a longer period, want to compare a lot of informations. This app is developed as you can use even if on 4-inch iPhone SE. If you will be using on large resolution device like iPad Pro, more comfortable.
Epoch
Create interactive timelines to visualize historical events and understand their flow. This app allows for detailed event mapping, filtering, and includes auto-generated practice questions to measure learning outcomes. Users can also share their timelines with others.
- Create interactive timelines
- Map events from 100 billion BCE to 9999 CE
- Filter events by flags, tags, and time period
- Navigate events with horizontal swipes
- Toggle year display and flags
- Auto-generated practice questions
- Share timelines with friends
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Create your own historical timelines. Epoch is perfect for anyone who wants to organize historical events around a specific theme or study historical dates and chronology. Create Timelines • Color-code events by category • Organize related events with tags • Add your own mnemonics • Add events from 100 billion years ago to the year 9999 Memorize Dates • Study dates with a flashcard-style interface • Review events in random order Take Quizzes • Answer chronological ordering questions based on events in your timeline • Set a time limit for an extra challenge Use Filters • Flag events for review • Filter events by flags, tags, categories, and date range Share Timelines • Share your timeline or collaborate with others using iCloud • Export your timeline in CSV (Pro feature)
Screenshots
Verdict
The clearest difference is rating: Epoch at 3.0 against Parallel Chronology's 1.0. Epoch also leads on update cadence (every 5 weeks vs every 5 months) and review sentiment (82% vs 64%). Parallel Chronology's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 26.0). On price, ratings volume, ads 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
Both are free to download. Epoch sells 1 one-off in-app purchase. Parallel Chronology asks for nothing beyond the download.
Epoch holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 64% of Parallel Chronology's written reviews are positive against 82% of Epoch's.
Parallel Chronology ships an update every 5 months, Epoch every 5 weeks. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.
| Parameter | Parallel Chronology | Epoch |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 3.0 (1 ratings) — better |
| Positive reviews | 64.3% of reviews | 81.8% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 5 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | 12+ | 4+ |
| Developer | Neusara LLC | Shu Kyogoku |
Customer experience
Parallel Chronology
Epoch
In-app purchases
Parallel Chronology
No in-app purchases
Epoch
- Upgrade to Pro version$7.99
Questions
Is Parallel Chronology free?
Is Epoch free?
Which has better reviews, Parallel Chronology or Epoch?
Do Parallel Chronology or Epoch have ads?
Which is updated more often, Parallel Chronology or Epoch?
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