Owned IP
Kastovia builds proprietary applications that can become long-term company assets.
Digital products
In-house mobile applications built as owned digital assets.
Kastovia Holdings LLC develops proprietary mobile products around clear user needs, scalable distribution, and sustainable monetization models.
Available now on Google Play
PixelShrink — Photo Resizer
Resize, crop, compress, verify, and share whole batches of photos without uploading them or creating an account. PixelShrink keeps originals untouched and includes ready-made formats for social platforms, creators, print, and marketplaces.
- Exact pixels, percentages, long-edge sizing, crop, fit, and padding
- Target a maximum KB/MB and compare a real result before the full batch
- Free core with no interstitial ads; optional permanent Pro unlock
PixelShrink
Photo Resizer · OfflineBatchResize & compress
PrivacyPhotos stay on device
PurchaseNo subscription
Product operating model
From concept to launch discipline.
Our internal product work strengthens the consulting side of the company because it keeps Kastovia close to real delivery constraints: product-market fit, user experience, analytics, monetization, and iteration.
ResearchUser problem, market, and competitor analysis
DesignUX flows, feature scope, and product architecture
BuildMobile application development and launch support
ImproveAnalytics, monetization, retention, and updates
Mobile-first
Product concepts are shaped for modern mobile behavior, simple UX, and fast adoption.
Monetization-aware
We consider revenue models, analytics, and lifecycle improvement from the beginning.
Product capabilities
The product lab connects research, experience design, engineering, and growth systems.
Market Research
Define user segments, competitive gaps, acquisition angles, and product assumptions before investing in build.
UX Architecture
Map onboarding, core actions, retention loops, account flows, and monetization touchpoints.
Mobile Delivery
Plan and execute mobile app builds with analytics, release discipline, and maintainable feature scope.
Growth Systems
Support app store positioning, landing pages, performance tracking, lifecycle messaging, and iteration.
Product lifecycle
From first signal to scalable asset.
Validate
Confirm the problem, user motivation, market context, and minimum useful product scope.
Launch
Build the first production-ready version with analytics, feedback loops, and clear positioning.
Compound
Use data, monetization, retention, and product updates to build durable value over time.