Comparison

UDCast vs Special KB

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

Head to head
About

UDCast

This application converts spoken words into on-screen captions and sign language interpretation. It also offers voice guidance through earphones, enhancing accessibility for users.

Highlights
  • Vocal recognition
  • On-screen captions
  • Sign language interpretation
  • Voice guidance output
  • Internet-based data download
  • Device testing function
Features
Read full description

The UDCast app recognizes vocal information received through your device’s microphone, and displays captions and sign-language interpretation on your device’s screen. It can also output voice guidance through your device’s earphones. Before using UDCast for the first time… (1) At the top UDCast screen, select Test. Then go to the reception area to confirm that your device is working properly. (2) Before using, you must connect to the Internet and download the desired assistance data (voice guide, captions, and/or sign-language help). For detailed help, see the Usage Guide.

About

Special KB

Features
Read full description

Because everyone is special.. Special KB is an adaptive cognitive keyboard. It doesn't just correct spelling—it works out what you were trying to say and helps you say it. Most keyboards are designed for one kind of typist. Special KB is designed for everyone else: people with dyslexia, dysgraphia, aphasia, ADHD, autism, Parkinson's, tremors, low vision, executive function difficulties, children learning to write, and anyone typing one-handed, tired or in a hurry. ## Recover the words you meant Ordinary autocorrect only fixes typing mistakes. Special KB's **Intent Recovery Engine** understands sound and meaning. • Corrects phonetic spelling such as *nolege*, *skool* and *fizix*. • Explains homophones like *their/there/they're* before you choose. • Find forgotten words from a description, rhyme or sound. • Built-in thesaurus and dictionary with instant definitions. • AI sentence help to simplify, rewrite, soften or check tone—only when you ask. Nothing is ever changed without your approval. ## Built for accessibility Special KB can automatically configure itself after answering a few simple questions. Features include: • Extra-large keys with adjustable spacing. • Dyslexia-friendly fonts including OpenDyslexic, Atkinson Hyperlegible and Lexend. • High-contrast themes. • Letters, words and text spoken aloud. • Typing on key release for easier accuracy. • Whole-word delete and accidental double-tap filtering. • Saved phrases and large communication buttons for common messages. • PIN protection for settings. ## Privacy first Everything you type stays on your device. There are no accounts, no analytics and no collection of your keystrokes. AI features only process text you explicitly choose to send, and it is never used for training. ## Subscription One subscription unlocks every feature—no tiers, no add-ons. A free 3-day trial lets you fully set up and use the keyboard before deciding. Without a subscription, Special KB continues to work as a standard keyboard, and all of your settings are preserved. Because everyone is special.

Screenshots

UDCast4 screens
Special KB4 screens

Verdict

The call

The clearest difference is in-app purchases: UDCast at none against Special KB's 1. UDCast also leads on iOS requirement (15.6 vs 17.0). Special KB's advantage is update cadence (every 8 days vs every 2 months). On price, ads and device support 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

Both are free to download. Special KB sells 1 in-app purchase, starting at $1.99 per month. UDCast asks for nothing beyond the download.

UpkeepUpdate frequency

UDCast ships an update every 2 months, Special KB every 8 days. The most recent releases landed on September 29, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 5 level
UDCast versus Special KB: the parameters behind the verdict, then further details
ParameterUDCastSpecial KB
PriceFreeFree
Positive reviews40.7% of reviews—
Update frequencyEvery 2 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size13 MB25 MB
Age rating4+4+
DeveloperPalabra Inc.Enfour, Inc.

In-app purchases

None

UDCast

No in-app purchases

1 purchases

Special KB

Subscriptions1
  • Special KB subscription$1.991 Month

Questions

Is UDCast free?
UDCast is free to download, with no in-app purchases.
Is Special KB free?
Special KB is free to download, with in-app purchases available.
Do UDCast or Special KB have ads?
Neither UDCast nor Special KB shows ads.
Which is updated more often, UDCast or Special KB?
UDCast ships an update every 2 months, and Special KB every 8 days. Most recently, UDCast was updated on September 29, 2026 and Special KB on October 11, 2026.

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