Hardware & Filament Profile
Slicer Output parameters
Business Parameters
0% Break-even
80% Maximum
DataStay Own Your Tools. Own Your Data.
I build sovereign, local-first web applications for businesses that demand absolute control over their digital infrastructure. No lock-in. No compromises.
Local-First Architecture
Your data is stored on your device, not my server. It moves at the speed of your hardware, not your internet connection.
One-Time Ownership
No monthly "tax" to access your own records. You buy the tool once; it stays in your workshop forever.
Hardened Logic
These aren't brittle spreadsheets. I build software "exoskeletons"—hardened HTML and JavaScript tools designed to be as durable as the physical machines you use to create.
Spool Ledger
Calculate the exact manufacturing costs and profit margins of your 3D printing jobs instantly. No cookies, no server latency.
Suggested Retail Price
CALCULATED VALUE (USD)
Base Production Cost:
Markup Target ():
Acquire Spool Ledger Lifetime
Launch Spool Ledger Demo
* Buy once, own forever. Zero recurring subscriptions.
Production Cost Telemetry
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DS-01 // FOUNDER
The Founder’s Promise:
Hi, Ben here. I am a solo developer, not a corporation. When you use a DataStay tool, you are using code that was built to last, designed to feel like a physical instrument rather than a temporary service, and engineered to respect your autonomy.
I started DataStay because I’m tired, like many of you, of the rental model. Your business logic shouldn't break because a server went down in another time zone, and your privacy shouldn't be the price of entry.
Data stays.
Tools work.
You own the workflow.
Intelligence Briefs
Guides and documentation for the sovereign web.
Analytics
Industrial Math of 3D Printing
How to calculate true manufacturing cost-per-print and stop losing margins.
10 MIN READ
Read
Android
Run Offline HTML on Android
Installing local-first web applications directly onto Android drives utilizing Chrome mechanics.
5 MIN READ
Read
iOS
Run Offline HTML on iOS
Technical workaround for launching local web tools standalone on iPhone/iPad using Safari.
5 MIN READ
Read
Sovereign Software vs. Alternatives
Why business-critical calculations belong in a local-first asset, not a rental template or cloud subscription.
| Comparison Factors |
RECOMMENDED
DataStay SpoolLedger
Sovereign Software
|
Standard Spreadsheet Brittle Template | Cloud SaaS Platform Subscription Model |
|---|---|---|---|
| Reliability & Updates |
Permanent Local Execution
Freeze your workspace. Immutable offline utility. Zero silent updates, broken formulas, or forced layout changes. |
Manual File Maintenance
Brittle templates. Office app updates can silently disrupt custom macro calculations and layout rules. |
Forced Cloud Changes
Zero ownership. Remote corporate updates alter UI dashboards and deprecate tracking features overnight. |
| Data Safety & Privacy |
Isolated Local Storage
100% offline. Saves data inside local browser sandbox. Zero remote tracking, cloud leaks, or third-party mining. |
Exposed Local Files
Unprotected files. Basic sheets easily corrupted, accidentally overwritten, or opened without access controls. |
External Data Logging
Targeted databases. Workshop numbers are uploaded to vendor servers, exposed to data leaks and hacks. |
| Setup & Access |
Dual Local Access Options
Instant offline access.
Boot instantly from an offline raw |
Office Software Dependent
Software overhead. Requires third-party office suites, account logins, and file format configurations. |
Persistent Network Gates
Online-only gates. Constant internet and mandatory registration required to access your operational inventory. |
| Mobile Utility |
One-Handed Workshop UI
Workshop-native design. Stacked, large touch targets built for rapid one-handed logging at the machine. |
Rigid Desktop Grid
Rigid widescreen grid. Forces constant dual-axis pinching, miniature zooming, and typing friction on mobile. |
Cloud-Delayed Interface
Server dependency. Slow mobile loads and frozen interfaces in workshop cellular dead zones. |
| Financial Commitment |
True Asset Ownership
True asset ownership. Flat one-time payment ($35). Zero subscription hikes or hidden platform tax. |
Hidden Labor Expenses
Hidden labor costs. Drains business revenue through active hours wasted fixing broken macros and templates. |
Continuous Subscription Tax
Continuous rental fee. Subscription costs stack up ($100+/yr). Lose data access if payment fails. |
| Own Spool Ledger — $35 Try the Math |
01. Reliability & Updates
SOVEREIGN
DataStay SpoolLedger
Permanent Local Execution
Freeze your workspace. Immutable offline utility. Zero silent updates, broken formulas, or forced layout changes.
Standard Spreadsheet
Manual File Maintenance
Brittle templates. Office app updates can silently disrupt custom macro calculations and layout rules.
Cloud SaaS Platform
Forced Cloud Changes
Zero ownership. Remote corporate updates alter UI dashboards and deprecate tracking features overnight.
02. Data Safety & Privacy
SOVEREIGN
DataStay SpoolLedger
Isolated Local Storage
100% offline. Saves data inside local browser sandbox. Zero remote tracking, cloud leaks, or third-party mining.
Standard Spreadsheet
Exposed Local Files
Unprotected files. Basic sheets easily corrupted, accidentally overwritten, or opened without access controls.
Cloud SaaS Platform
External Data Logging
Targeted databases. Workshop numbers are uploaded to vendor servers, exposed to data leaks and hacks.
03. Setup & Access
SOVEREIGN
DataStay SpoolLedger
Dual Local Access Options
Instant offline access.
Boot instantly from an offline raw .html file or a 1-minute PWA install.
Standard Spreadsheet
Office Software Dependent
Software overhead. Requires third-party office suites, account logins, and file format configurations.
Cloud SaaS Platform
Persistent Network Gates
Online-only gates. Constant internet and mandatory registration required to access your operational inventory.
04. Mobile Utility
SOVEREIGN
DataStay SpoolLedger
One-Handed Workshop UI
Workshop-native design. Stacked, large touch targets built for rapid one-handed logging at the machine.
Standard Spreadsheet
Rigid Desktop Grid
Rigid widescreen grid. Forces constant dual-axis pinching, miniature zooming, and typing friction on mobile.
Cloud SaaS Platform
Cloud-Delayed Interface
Server dependency. Slow mobile loads and frozen interfaces in workshop cellular dead zones.
05. Financial Commitment
SOVEREIGN
DataStay SpoolLedger
True Asset Ownership
True asset ownership. Flat one-time payment ($35). Zero subscription hikes or hidden platform tax.
Standard Spreadsheet
Hidden Labor Expenses
Hidden labor costs. Drains business revenue through active hours wasted fixing broken macros and templates.
Cloud SaaS Platform
Continuous Subscription Tax
Continuous rental fee. Subscription costs stack up ($100+/yr). Lose data access if payment fails.