Our Work
PeptOnyx Calculator
Enter your numbers. See your measurement. Check the maths.
PeptOnyx Calculator is a private, simple dosing and reconstitution companion -- it turns a prescribed dose into an exact syringe measurement, with the full working shown so you never have to just trust a black-box result.
No account, no cloud sync, works fully offline. The web calculator is live today; iPhone and Android apps are in review.
Visit the PeptOnyx site · Try the calculator · Privacy Policy · Support
Persephone
Women's health, thoughtfully designed.
Persephone is our flagship software product — a companion app designed to help women better understand and manage their health journey.
Combining medication tracking, symptom insights, reminders, and personal health trends, Persephone brings clarity and confidence to navigating HRT, GLP-1 medications, and wellbeing.
Built with a calm, supportive approach, Persephone is designed to help women feel informed, empowered, and connected to their own health data.
Available now on iPhone and Android.
Pawdle
One dog breed a day. How few clues can you solve it in?
Pawdle is a daily puzzle game in the style of Wordle, for dog lovers. Each day brings one breed to guess — a photo starts almost completely blurred, and every clue you reveal sharpens it a little more.
87 breeds spanning all seven AKC groups, a daily streak, a fun fact revealed at the end of every round, and a no-spoiler shareable result grid.
Free to play, with a one-time purchase to go ad-free. Currently in development for iPhone and Android.
Purrdle
One cat breed a day. How few clues can you solve it in?
Purrdle is a daily puzzle game in the style of Wordle, for cat lovers. Each day brings one breed to guess — a photo starts almost completely blurred, and every clue you reveal sharpens it a little more.
90 breeds spanning natural breeds, hybrids, rex and hairless varieties, and bobtails, a daily streak, a fun fact revealed at the end of every round, and a no-spoiler shareable result grid.
Free to play, with a one-time purchase to go ad-free. Currently in development for iPhone and Android.
AV Portfolio
Decades of creating experiences through technology.
Before SoundGrounds, Carl was a co-founder of Acorn AV, a London-based audiovisual company he helped build over 10 years, as part of a career spanning more than two decades in AV.
Throughout his AV career, Carl worked across live events, corporate productions, installations, and technical solutions, combining creativity with engineering expertise.
This portfolio showcases selected work from that journey — projects that demonstrate the power of thoughtful technical design, collaboration, and attention to detail.
Bean Counter
Coffee, community, and connection.
Bean Counter began during the COVID-19 pandemic as a way to create connection and community during an uncertain time.
What started as a coffee project grew into something much bigger — becoming a local community icon through collaboration with Curious Roo Specialty Coffee.
Bean Counter represents many of the values that define SoundGrounds: bringing people together, creating memorable experiences, and building something meaningful from a simple idea.
