# Paresis/Paralysis vs Parallel

The clearest difference is price: Parallel at Free against Paresis/Paralysis's $4.99. Parallel also leads on update cadence (every 3 weeks vs every 34 months). Paresis/Paralysis's advantage is rating (5.0 vs 4.5) and in-app purchases (none vs 4). On review sentiment, ratings volume and ads there is nothing between them.

Parallel is free to download; Paresis/Paralysis costs $4.99 up front. Parallel sells 4 one-off in-app purchases. Paresis/Paralysis asks for nothing beyond the download.

Paresis/Paralysis holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Paresis/Paralysis ships an update every 34 months, Parallel every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Paresis/Paralysis | Parallel |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/paresisparalysis/id644770466/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/parallel-history-timeline/id6772115245/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 94 MB | 5 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Blue Tree Publishing, Inc.](https://appshunter.io/developer/496143325) | [Anatol Knotek](https://appshunter.io/developer/1895362751) |

## What reviewers say

### Paresis/Paralysis

[App page](https://appshunter.io/ios/app/paresisparalysis/id644770466)

This educational app provides detailed visual and auditory learning resources for vocal pathologies like paralysis and paresis. It features videos, animations, and audio clips to help students, patients, and professionals understand and teach these conditions.

**Highlights:** Videos of vocal fold disorders, Audio clips of patient readings, Animated vocal fold illustrations, Structure identification, Zoom and pan functionality, Play/pause/stop controls

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

**In-app purchases:** none


### Parallel

[App page](https://appshunter.io/ios/app/parallel-history-timeline/id6772115245)

Explore historical connections by viewing multiple timelines simultaneously. Discover who lived at the same time as historical figures and events. Create custom collections or use curated ones to delve into specific eras and topics.

**Highlights:** View multiple historical timelines, Discover contemporaries at a glance, Access concise biographies with Wikipedia links, Create custom history collections, Offline functionality, Private and no tracking

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Painters & Sculptors XL | $1.99 | one-time |
| Buildings XL | $1.99 | one-time |
| Science & Technology XL | $1.99 | one-time |
| Parallel Pro | $3.99 | one-time |


## Frequently asked questions

### Is Paresis/Paralysis free?

Paresis/Paralysis costs $4.99, with no in-app purchases.

### Is Parallel free?

Parallel is free to download, with in-app purchases available.

### Which has better reviews, Paresis/Paralysis or Parallel?

Paresis/Paralysis is rated higher. Paresis/Paralysis averages 5.0 out of 5 from 1 ratings, while Parallel averages 4.5 from 2 ratings.

### Do Paresis/Paralysis or Parallel have ads?

Neither Paresis/Paralysis nor Parallel shows ads.

### Which is updated more often, Paresis/Paralysis or Parallel?

Paresis/Paralysis ships an update every 34 months, and Parallel every 3 weeks. Most recently, Paresis/Paralysis was updated on October 23, 2026 and Parallel 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.*