Comparison

Chemistry Keyboard vs PhysiKey

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

Head to head
About

Chemistry Keyboard

Easily input chemical formulas with specialized superscript, subscript, and arrow characters. Access lowercase Greek letters and other chemistry-related Unicode symbols. This keyboard extension works offline and includes a demo for viewing Wikipedia data.

Highlights
  • Superscript characters
  • Subscript characters
  • Arrow glyphs
  • Lowercase Greek characters
  • Chemistry Unicode characters
  • Offline functionality
  • Wikipedia data lookup demo
Features
Read full description

The Chemistry Keyboard is a specialized Keyboard Extension for anyone who needs to enter chemical formulae. Ever need to input Hg²⁺+2 I⁻ on your phone and can't figure out how to get those nice superscript or subscript 2s. Or proper arrow glyphs? Quickly generate superscripts: ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁽ ⁾ ⁺ ⁻, subscripts: ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₍ ₎ ₊ ₋, and arrows. lowercase Greek characters available in landscape mode. and other chemistry related Unicode characters. The app itself demonstrates the keyboard's use by allowing text entry and looking up data from Wikipedia. Unlike many keyboard extensions, this keyboard does not require network access. It's entirely self contained.

About

PhysiKey

This iOS keyboard is designed for physical and occupational therapists to quickly input common medical symbols, shorthand, and acronyms into any app. Streamline charting and patient profile writing for increased efficiency in practice.

Highlights
  • Medical shorthand and symbols
  • Customizable keyboard for PT/OT
  • Works with any iPad app
  • Increases charting efficiency
  • Quickly enter patient observations
Features
Read full description

PhysiKey – Physical Therapy Edition NEW VERSION 2.1! PhysiKey now includes a redesigned companion app with full iPhone support, an improved keyboard layout, larger keys, enhanced navigation, and an even better documentation experience for rehabilitation professionals. Document faster. Chart smarter. PhysiKey is a custom iPad keyboard built specifically for physical therapists, occupational therapists, and rehabilitation professionals. Quickly enter clinical abbreviations, documentation shortcuts, and PT-specific symbols without interrupting your workflow. Whether you're documenting evaluations, daily treatment notes, or patient progress, PhysiKey helps reduce typing, improve consistency, and speed up documentation in virtually any app that supports custom keyboards. Features • PT-specific documentation shortcuts including: EVAL, DOB, c/o, h/o, w/o, neg, pos, and more. • Over 25 physical therapy symbols including: Directional arrows, body position symbols, fractions, Greek letters, macrons, and other commonly used clinical notation. • Recently Used symbols automatically keep your most frequently accessed symbols within easy reach. • Familiar typing experience with: Shift and Caps Lock Auto-capitalization Double-space period Native iPad keyboard layout • Works with virtually any app that supports custom keyboards, including electronic medical records (EMRs), web-based documentation systems, email, messaging, Safari, Notes, and many other productivity apps. Designed by Clinicians PhysiKey was developed with input from experienced physical therapists to provide a keyboard designed specifically for rehabilitation documentation—not a generic medical keyboard. Spend less time searching for symbols and abbreviations, and more time focused on your patients.

Screenshots

Chemistry Keyboard3 screens
PhysiKey4 screens

Verdict

The call

The clearest difference is review sentiment: Chemistry Keyboard at 88% against PhysiKey's 0%. Chemistry Keyboard also leads on iOS requirement (15.0 vs 26.0). PhysiKey's advantage is update cadence (monthly vs every 6 months). On price, ads, in-app purchases and monetization model 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

Chemistry Keyboard costs $1.99 and PhysiKey $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Chemistry Keyboard ships an update every 6 months, PhysiKey monthly. The most recent releases landed on October 21, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Chemistry Keyboard versus PhysiKey: the parameters behind the verdict, then further details
ParameterChemistry KeyboardPhysiKey
Price$1.99$1.99
Rating4.6 (17 ratings) — better—
Positive reviews87.5% of reviews — better0.0% of reviews
Number of ratings17 — better—
Update frequencyEvery 6 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size9 MB4 MB
Age rating4+4+
DeveloperGenerally Helpful SoftwareFintech Solutions, Inc.

Customer experience

Chemistry Keyboard

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews24 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

PhysiKey

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Chemistry Keyboard

No in-app purchases

None

PhysiKey

No in-app purchases

Questions

Is Chemistry Keyboard free?
Chemistry Keyboard costs $1.99, with no in-app purchases.
Is PhysiKey free?
PhysiKey costs $1.99, with no in-app purchases.
Do Chemistry Keyboard or PhysiKey have ads?
Neither Chemistry Keyboard nor PhysiKey shows ads.
Which is updated more often, Chemistry Keyboard or PhysiKey?
Chemistry Keyboard ships an update every 6 months, and PhysiKey monthly. Most recently, Chemistry Keyboard was updated on October 21, 2026 and PhysiKey on October 1, 2026.

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