Track your collection. Preserve its history.
SPQR Developers builds modern apps for hobbyists and collectors who care about detail,
organization, and long-term records. From gardens to fountain pens, watches, and collector cars,
our apps are designed to help you enjoy your hobby more deeply.
Clean design. Private by default. Built for real enthusiasts by real enthusiasts.
Apps for Enthusiasts and Collectors
Focused tools built for real hobby use
MotorVault
Track collector cars, service history, mileage, values, photos, and documents in one organized archive.
- Organize your garage
- Track service and valuation
- Generate polished reports
GrowZone+
Choose the right plants for your conditions and keep your garden notes, plans, and photos organized.
- Match plants to your climate
- Track your garden over time
- Keep notes and photos together
Auction Calculator
Quickly calculate the real cost of auction purchases, including fees, shipping, taxes, and currency conversion.
- Instant cost calculation
- Domestic and foreign auctions
- Built for real-world buying
Penfolio
Catalog fountain pens, inks, and writing samples in a clean archive designed for collectors and enthusiasts.
- Track pens and inks
- Store swabs and notes
- Keep your collection organized
TempusArchive
Document watch collections with service history, strap records, wear logs, and ownership details.
- Track watches precisely
- Log service and wear
- Preserve records over time
Why SPQR Developers?
Independent software for people who take their hobbies seriously
Built specifically for hobbyists and collectors, not generic productivity use.
Your data is yours. No ads, no clutter, no unnecessary complexity.
Designed to be clear, accurate, and dependable for long-term record keeping.
Crafted by an independent studio with respect for enthusiast communities by people in those communities.
Built for Long-Term Use
Trust matters when you are recording something you care about
Simple paid unlocks for full collecting without recurring fees.
Organized around real hobby workflows, not bloated feature lists.
Apps are updated and expanded over time as new needs emerge.
Questions and feedback go straight to the studio, not into a corporate void.
The SPQR Developers Philosophy
Hobbies connect people across cultures, backgrounds, and generations
We believe hobbyists deserve modern, well-designed tools. Too many niche apps are outdated,
cluttered, or built as afterthoughts. SPQR Developers creates focused software that helps
enthusiasts organize what they love, preserve history, and get more enjoyment from the hobbies
that matter to them.
Explore the Portfolio
A growing family of apps for collectors and hobbyists
Learn More
Want to learn more about our apps or get in touch?