Purpose-built apps for collectors and professionals.
SPQR Developers builds modern apps for people who care about detail, organization, and long-term records. From collections to professional credentialing, our apps are designed to help you stay organized and work more clearly.
Clean design. Private by default. Easy to use.
Apps for Enthusiasts and Professionals
Focused tools built for everyday 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?
Built for specific communities and workflows, 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 direct support and active maintenance.
Built for Long-Term Use
Trust matters when you are recording something important
Simple paid unlocks without recurring fees.
Organized around real 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
Focused software for people who care about detail.
We believe people deserve modern, well-designed tools for the records that matter to them. Too many niche apps are outdated, cluttered, or built as afterthoughts. SPQR Developers creates focused software that helps people organize what they collect, manage, and preserve.
Explore the Portfolio
A growing family of apps for collectors, enthusiasts, and professionals
Learn More
Want to learn more about our apps or get in touch?