# Synapse vs Vocabulary Builder

The clearest difference is in-app purchases: Synapse at none against Vocabulary Builder's 1. Vocabulary Builder's advantage is iOS requirement (15.0 vs 17). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Vocabulary Builder sells 1 in-app purchase, starting at $5.99 per month. Synapse asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Synapse | Vocabulary Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/vocabulary-builder-1983/id6768650656/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | — | Subscription |
| Size | 181 MB | 19 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Mattia Capomagi](https://appshunter.io/developer/1895857137) | [soumaya Jameleddine](https://appshunter.io/developer/1890260603) |

## What reviewers say

### Synapse

[App page](https://appshunter.io/ios/app/synapse-daily-knowledge/id6764631049)

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

**In-app purchases:** none


### Vocabulary Builder

[App page](https://appshunter.io/ios/app/vocabulary-builder-1983/id6768650656)

Explore words through a unique two-dimensional map of intensity and nuance. Discover curated definitions and examples, then test your knowledge with adaptive quizzes. Track your progress and earn virtual achievements.

**Highlights:** Two-dimensional word mapping (intensity & nuance), Curated definitions and examples, Adaptive quiz modes (definition, nuance, intensity), Practice progress tracking (heatmap, missed words), Daily Word of the Day widget, Mastery achievements

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1983 Pro | $5.99 | per month |


## Frequently asked questions

### Is Synapse free?

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

### Is Vocabulary Builder free?

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

### Do Synapse or Vocabulary Builder have ads?

Neither Synapse nor Vocabulary Builder shows ads.

### Which is updated more often, Synapse or Vocabulary Builder?

Synapse ships an update every 2 days, and Vocabulary Builder every 2 days. Most recently, Synapse was updated on October 25, 2026 and Vocabulary Builder 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.*