# Parallel Chronology vs WordUnlock study focus

The clearest difference is in-app purchases: Parallel Chronology at none against WordUnlock study focus's 2. WordUnlock study focus's advantage is update cadence (every 3 days vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. WordUnlock study focus sells 2 in-app purchases, starting at $4.99 per month. Parallel Chronology asks for nothing beyond the download.

Parallel Chronology ships an update every 9 months, WordUnlock study focus every 3 days. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Parallel Chronology | WordUnlock study focus |
| --- | --- | --- |
| 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 | No |
| Update frequency | Every 9 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 12 MB | 36 MB |
| Requires iOS | **15.0** | 16 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Neusara LLC](https://appshunter.io/developer/1462606266) | [ruki hamaguchi](https://appshunter.io/developer/1310543096) |

## 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, Vision Pro support

**In-app purchases:** none


### WordUnlock study focus

[App page](https://appshunter.io/ios/app/wordunlock-study-focus/id6804361713)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan (Monthly Renewal) | $4.99 | per month |
| Premium Plan (Annual Renewal) | $36.99 | per year |


## Frequently asked questions

### Is Parallel Chronology free?

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

### Is WordUnlock study focus free?

WordUnlock study focus is free to download, with in-app purchases available.

### Do Parallel Chronology or WordUnlock study focus have ads?

Neither Parallel Chronology nor WordUnlock study focus shows ads.

### Which is updated more often, Parallel Chronology or WordUnlock study focus?

Parallel Chronology ships an update every 9 months, and WordUnlock study focus every 3 days. Most recently, Parallel Chronology was updated on November 7, 2026 and WordUnlock study focus on November 6, 2026.

---

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