# Parallel Chronology vs 歴史総合・日本史探究｜アシストシステム

The clearest difference is in-app purchases: Parallel Chronology at none against 歴史総合・日本史探究｜アシストシステム's 1. Parallel Chronology also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). 歴史総合・日本史探究｜アシストシステム's advantage is update cadence (fortnightly vs every 5 months). On price and device support there is nothing between them.

Both are free to download. 歴史総合・日本史探究｜アシストシステム sells 1 one-off in-app purchase. Parallel Chronology asks for nothing beyond the download.

Parallel Chronology ships an update every 5 months, 歴史総合・日本史探究｜アシストシステム fortnightly. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Parallel Chronology | 歴史総合・日本史探究｜アシストシステム |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/parallel-chronology/id1462606267/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 14 MB | 425 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Neusara LLC](https://appshunter.io/developer/1462606266) | [Tsuyoshi Hayakawa](https://appshunter.io/developer/314516929) |

## What reviewers say

### Parallel Chronology

[App page](https://appshunter.io/ios/app/parallel-chronology/id1462606267)

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.

**Highlights:** 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)

**Features:** macOS Compatibility

**In-app purchases:** none


### 歴史総合・日本史探究｜アシストシステム

[App page](https://appshunter.io/ios/app/id6504427231)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 日本史探究追加データ | $2.99 | one-time |


## Frequently asked questions

### Is Parallel Chronology free?

Parallel Chronology is free to download, with no in-app purchases.

### Is 歴史総合・日本史探究｜アシストシステム free?

歴史総合・日本史探究｜アシストシステム is free to download, with in-app purchases available.

### Do Parallel Chronology or 歴史総合・日本史探究｜アシストシステム have ads?

歴史総合・日本史探究｜アシストシステム shows ads; Parallel Chronology does not.

### Which is updated more often, Parallel Chronology or 歴史総合・日本史探究｜アシストシステム?

Parallel Chronology ships an update every 5 months, and 歴史総合・日本史探究｜アシストシステム fortnightly. Most recently, Parallel Chronology was updated on October 7, 2026 and 歴史総合・日本史探究｜アシストシステム on October 24, 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.*