ISS calculator vs SonicKeys
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ISS calculator
This tool helps assess the severity and extent of ichthyosis across the body. It's designed for clinical trials, research, and practice to track treatment response in adults and children. The system follows FDA guidelines for comprehensive scoring.
- Assess ichthyosis extent and severity
- User-friendly instrument
- For clinical trials and research
- Track treatment response
- Score adults and children
- Follows FDA guidelines
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The Ichthyosis Scoring System (ISS) is a comprehensive and user-friendly instrument for assessing the extent and clinical severity of ichthyosis across the entire body. It is designed for use in clinical trials, research and clinical practice to assess severity and response to treatments. We make it easy for researchers and physicians to calculate a severity score for adults and children with ichthyosis. The ISS was conceived and developed by Keith Choate, Amy Paller and Mary Sun in response to the U.S. Food and Drug Administration's recommendation for an ichthyosis severity assessment tool that can score the entire body surface, with scoring categories tailored to FDA guidelines. Disclaimer: Please seek a dermatologist’s advice before making any medical decisions based on the calculated severity score.
SonicKeys
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Transform your iPhone typing experience with SonicKeys — a custom keyboard that plays satisfying mechanical keyboard, typewriter, and soft click sounds as you type. • 3 premium sound themes: Mechanical Keyboard, Typewriter, Soft Click • Instant playback with virtually zero latency • Haptic feedback support • Works in every app • No data collected — your keystrokes stay private Full Access is required only for audio playback. SonicKeys never records, stores, or transmits what you type.
Screenshots
Verdict
The clearest difference is iOS requirement: ISS calculator at 13.0 against SonicKeys's 17.0. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ISS calculator ships an update every 3 days, SonicKeys every 2 days. The most recent releases landed on September 22, 2026 and October 8, 2026 respectively.
| Parameter | ISS calculator | SonicKeys |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Sujal Adhia | Yongjun Hong |
In-app purchases
ISS calculator
No in-app purchases
SonicKeys
No in-app purchases
Questions
Is ISS calculator free?
Is SonicKeys free?
Do ISS calculator or SonicKeys have ads?
Which is updated more often, ISS calculator or SonicKeys?
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