Comparison

VDWrite vs Unit Circle Calculator PRO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

VDWrite

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
Read full description

Voice Dream Writer helps everyone write better: Text-to-speech proofreading reduces mistakes, phonetic and meaning search help you use the right words, and an active outline helps you organize and improve the structure of your writing. • Featured in the US App Store Education Collection. • "Voice Dream Writer's technically designed for people with reading disabilities, but it's useful for just about anyone who needs a little help proofing." - Lifehacker Text-To-Speech Proofreading. Professional proofreaders recommend reading out loud as the best way to catch mistakes. Like a personal proofreader, Voice Dream Writer reads your writing using text-to-speech, so you can easily spot awkward sentences, grammatical errors and typos. Also, it can read words and sentences as you type or voice dictate. This way, you can type faster because you no longer have to look up to check the text you just wrote. Word Finder. Voice Dream Writer helps you find the right words using phonetic search and meaning search. For example, search for "inuf" phonetically, and you will find "enough", and search for "Fast Africa Cat" by meaning and you will find "Cheetah." Word Finder also shows you the dictionary definition of a word as you type without you having to select anything or open another program. Outline. As you write, Voice Dream Writer automatically creates an outline of headings, paragraphs and sentences. The Outline helps you structure your document better by giving you an always-on overview. You can also quickly navigate to a section in a long document without endless scrolling. Finally, you can drag and drop elements in the Outline to organize your writing. No more selecting, cutting and pasting large blocks of text. Besides these unique features, Voice Dream Writer also comes with everything you would expect from any great writing tool: • Comprehensive settings for text appearance • Uncluttered writing area • Search for text • Search for misspelled words • Word count • Synchronize and backup with iCloud • Import and export for Dropbox, Google Drive, and Box • Preview and print with multiple themes • Markdown support for formatting • Export to Microsoft Word format (compatible with Apple Pages) • Support for Bluetooth keyboard The app is not only fully accessible, it was designed with students and adults with print disabilities in mind. There are special tools for VoiceOver users to manage the cursor, select text, and find and correct misspelled words by stepping through them. Voice-based Proofreading and Phonetic Search are invaluable for people with dyslexia. Also included is the research-proven Dyslexie font. Voice Dream Writer will continue to evolve. We would love to hear from you!

About

Unit Circle Calculator PRO

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
Read full description

The unit circle is visualized and explained with calculation steps, diagrams and animations. Enter the radian or the angle α to calculate the results. Negative values, decimals, fractions and π are supported. The solution is displayed step by step. All calculations are saved in the history. The solution can be shared. [ Contents] - all important quantities for the unit circle - results are also calculated as π-value - animation to show the angle α - diagrams for sine and cosine - history function to save the input - detailed solution - negative values, decimal numbers, fractions and π are supported - no ads! [ Usage ] - there are fields for entering values using a special keyboard - press the check mark button at the bottom right to start the calculation - if values are missing, all fields will be marked orange - if the values are wrong, the affected field will be highlighted red - the entries in the history can be deleted or sorted - if you select an entry in the history, it will be automatically loaded for the calculation - the whole history can be deleted by pressing a button - solutions can be shared

Screenshots

VDWrite1 screens
Unit Circle Calculator PRO4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
VDWrite versus Unit Circle Calculator PRO: the parameters behind the verdict, then further details
ParameterVDWriteUnit Circle Calculator PRO
PriceFree — better$1.99
Rating4.1 (65 ratings)4.7 (25 ratings) — better
Positive reviews67.9% of reviews100.0% of reviews — better
Number of ratings65 — better25
Update frequencyMonthlyMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size47 MB181 MB
Age rating4+4+
DeveloperOpus Noma LLCGlindemann, Sennoun, Langer GbR

Customer experience

VDWrite

All ratings65 ratings
Positive72.3%
Neutral10.8%
Negative16.9%
Written reviews81 reviews
Positive67.9%
Neutral12.3%
Negative19.8%

Unit Circle Calculator PRO

All ratings25 ratings
Positive92.0%
Neutral0.0%
Negative8.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

VDWrite

No in-app purchases

None

Unit Circle Calculator PRO

No in-app purchases

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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