# VDWrite vs Unit Circle Calculator PRO

The clearest difference is price: VDWrite at Free against Unit Circle Calculator PRO's $1.99. Unit Circle Calculator PRO's advantage is rating (4.7 vs 4.1) and review sentiment (100% vs 68%). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

VDWrite is free to download; Unit Circle Calculator PRO costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Unit Circle Calculator PRO holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 65 and 25 respectively. Written reviews point the same way: 68% of VDWrite's written reviews are positive against 100% of Unit Circle Calculator PRO's.

Both ship on a similar rhythm, roughly monthly. Both last shipped on September 29, 2026.

## The numbers

| Metric | VDWrite | Unit Circle Calculator PRO |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.1 (65 ratings)](https://appshunter.io/ios/app/vdwrite/id920583100/reviews) | **[4.7 (25 ratings)](https://appshunter.io/ios/app/unit-circle-calculator-pro/id1606376541/reviews)** |
| Number of ratings | **65** | 25 |
| Positive reviews | 67.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Paid | Paid |
| Size | 47 MB | 181 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Opus Noma LLC](https://appshunter.io/developer/1501593543) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### VDWrite

[App page](https://appshunter.io/ios/app/vdwrite/id920583100)

This writing app offers text-to-speech proofreading to catch errors, a word finder for better vocabulary, and an active outline for organizing and restructuring documents. It's designed to help users write more effectively and efficiently.

**Highlights:** Text-to-speech proofreading, Phonetic and meaning word search, Active document outline, Voice dictation support, iCloud synchronization, Cloud storage integration

**Features:** Vision Pro support

**In-app purchases:** none


### Unit Circle Calculator PRO

[App page](https://appshunter.io/ios/app/unit-circle-calculator-pro/id1606376541)

Visualize and understand the unit circle with step-by-step calculations, diagrams, and animations. Supports various input formats including negative values, decimals, fractions, and pi. Save, share, and revisit past calculations.

**Highlights:** Unit circle visualization, Step-by-step calculation, Diagrams and animations, Supports negative values, decimals, fractions, and π, Calculation history, Shareable solutions

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

**In-app purchases:** none


## Frequently asked questions

### Is VDWrite free?

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

### Is Unit Circle Calculator PRO free?

Unit Circle Calculator PRO costs $1.99, with no in-app purchases.

### Which has better reviews, VDWrite or Unit Circle Calculator PRO?

Unit Circle Calculator PRO is rated higher. VDWrite averages 4.1 out of 5 from 65 ratings, while Unit Circle Calculator PRO averages 4.7 from 25 ratings.

### Do VDWrite or Unit Circle Calculator PRO have ads?

Neither VDWrite nor Unit Circle Calculator PRO shows ads.

### Which is updated more often, VDWrite or Unit Circle Calculator PRO?

VDWrite ships an update monthly, and Unit Circle Calculator PRO monthly. Most recently, VDWrite was updated on September 29, 2026 and Unit Circle Calculator PRO on September 29, 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.*