Steward Oak Holdings
Steward Oak Holdings LLC

Four businesses,
one steward.

Steward Oak Holdings owns a money planning app, a shop of spreadsheet money tools, a photo service for events, and an enterprise software company for teams that use mainframes.

sigvy

Money Planner

Budget, debt payoff and net worth in one simple app. No account, no bank login.

Explore sigvy →

SlateAndSum

Simple, automated money tools for Google Sheets and Excel, sold on Etsy.

Explore SlateAndSum →
Strobe

Your photos find you.

Strobe finds the photos you're in from concerts, tournaments, festivals and events.

Explore Strobe →
TN3270E · TLS Command ===> _ F1=Help F3=Exit
Strovent Systems

Strovent Terminal

Enterprise software for teams that still run on the mainframe.

Explore Strovent →
sigvy
Coming soon to iOS & Android

Budget, debt payoff and net worth, in one simple app

Plan your month, pick snowball or avalanche, and see your debt-free date. No account, no bank login: your numbers stay on your phone.

Get notified at sigvy.comSee features
sigvy budget screensigvy home dashboardsigvy debt payoff screen

Everything in one place

Type in your own numbers and sigvy does the math: totals, what's left, payoff dates and progress. It opens with a sample household so you can see every screen working.

1

Monthly budget

Income, expense and savings-goal categories with budget vs actual. See what's left for the month and switch between months.

2

Quick Add

Enter an amount, tap a category, save. Log a debt payment the same way and your payoff plan updates.

3

Debt payoff

Compare snowball and avalanche side by side. See your debt-free date, the interest still to pay and a monthly payoff schedule.

4

Home dashboard

This month at a glance: income, spending, goals, debt payments and what's left over, plus year-to-date totals and a 6-month chart.

5

Net worth & FI

Monthly snapshots of assets and liabilities, your FI number, years to FI and your savings rate.

6

CSV export & import

Export your data as CSV, and import it to restore a backup or move to a new phone.

No account. No bank login. No server.

Everything you enter is stored on your phone, and manual entry means you see every number.

Visit sigvy.comSupport & FAQ
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SlateAndSum
Google Sheets & Excel

Simple, automated money tools for Google Sheets & Excel

Budget, pay off debt and track your net worth. Enter your numbers and the sheet handles the totals, charts and progress for you.

Visit the shop on Etsyslatesum.com
Slate Money Planner dashboard
Monthly viewDebt payoff progress

The tools

Every sheet comes filled with sample data so you can see it working right away, then you type over it with your own numbers.

The Slate Money Planner
All-in-one

The Slate Money Planner

Budget, pay off debt and track your net worth in one automated sheet. Enter each number once on the Quick Add tab and it flows everywhere.

View on Etsy →
Debt Snowball Tracker
Debt

Debt Snowball Tracker

Plan your payoff with the snowball or avalanche method, then log real payments and watch your debt-free date update itself.

View on Etsy →
Monthly Budget
Budget

Monthly Budget

A simple one-month budget. Plan it, log it, and see what's left, all on one clean dashboard.

View on Etsy →
Net Worth and FI Tracker
Net worth

Net Worth & FI Tracker

Track your net worth every month, see your savings rate, and estimate when you could reach financial independence.

View on Etsy →

How it works

An instant digital download through Etsy. Nothing is shipped.

1

Download

Your files are ready as soon as payment is confirmed, from the Etsy email or You → Purchases.

2

Open in Sheets or Excel

A PDF quick-start guide plus .xlsx files for Google Sheets and Excel, with a "Make a copy" link for Google Drive.

3

Make it yours

Input cells are shaded light tan and everything else calculates for you. No scripts, macros or add-ons.

Start with the shop

Browse every SlateAndSum tool on Etsy.

SlateAndSumCo on EtsySupport
Strobe

Every great moment has a photo of you in it.

Strobe finds the photos you're in from concerts, tournaments, festivals and events, and sends them straight to your phone.

Your photos find you.
Find my photosBring Strobe to your event
Opt-in only. Private by default.
9:41
Sunday, November 1
STROBE · nowYou're in 14 new photos 🎉From last night's show.
STROBE · 2h agoTournament photos are in9 new photos of you.

Three steps. Zero scrolling.

You don't dig through thousands of photos. Strobe does the looking.

1

Opt in

Add a quick selfie. Nobody is matched unless they ask.

2

Photographers upload

Photographers upload once to a private album. That's it.

3

Your photos find you

Get a notification when new photos of you land. Save your favorites and share them with family.

Upload once. Everyone finds their photos.

Built for the people who make the moments: event and league directors, and the photographers who capture them.

RacesConcertsTournamentsLeaguesFestivals

For event and league directors

Give every participant and fan their photos, with fewer "where are my photos?" emails.

For photographers

Use Strobe as your distribution tool. Upload once and people find their own photos.

Consent built in

People opt in when they sign up, so nobody is matched unless they ask.

Find your photos.

Open Strobe at app.strobe.photos. Private by default, and your photos are never sold.

Open the appTalk to us about partnering
Strovent Systems
Strovent Systems

Enterprise software for teams that still run on the mainframe

We build Strovent Terminal, a modern terminal emulator for IBM Z and IBM i, on iPhone and iPad, and we design custom systems that connect core platforms to the way people work today.

Visit strovent.comTalk to us
Product

Strovent Terminal: the mainframe and IBM i terminal, rebuilt for iPhone and iPad

A fast terminal emulator for IBM Z and IBM i, designed around the hardware keyboard and touch.

  • Hardware keyboard first. F1–F24 map to PF keys, with full remapping.
  • Tappable key labels. "F3=Exit" on the host screen becomes a button.
  • TLS and TN3270E. Models 2–5 up to 27×132, and many EBCDIC code pages.
  • Multiple sessions and scripts. Switch with Ctrl+Tab; automate logons.
  • Built-in demo host. Try everything offline. No mainframe needed.
Product support
Strovent Terminal on iPad, with the sessions sidebar open
Strovent Terminal on iPad
Customer inquiry screen with tappable key labels
Customer inquiry on the built-in demo host
Demo host main menu with tappable key labels
Tap a key label and it acts like pressing the key
IN DEVELOPMENT

Enterprise edition: 3270 access your IT team can deploy and control

A free-to-download edition that unlocks only with a company sign-in. IT manages seats, host configurations and scripts centrally.

  • Single sign-on. Microsoft Entra ID, Google Workspace, Okta, or OpenID Connect and SAML.
  • IT admin portal. Add and remove seats, push hosts and scripts, lock settings.
  • Device management. Built so MDM tools such as Intune and Jamf can push configuration.
Request early access
Modernization

Modern front ends for your 3270 applications

We build web, mobile and desktop interfaces on top of the IBM 3270 systems you already run. Your COBOL, CICS and IMS applications stay exactly as they are.

  • No backend rewrite. Host programs, data and security stay unchanged.
  • Your existing security. Access still runs through RACF, ACF2 or Top Secret.
  • Incremental. Modernize one workflow at a time, starting with a pilot.
Discuss a project
CICS · TN3270E · TLS 1.3 · MODEL 4 SESSION A ACCOUNT INQUIRY LU GSA00412 ────────────────────────────────────────── ACCT STATUS REGION UPDATED 100231 ACTIVE CENTRAL 09:30 100245 ACTIVE WEST 09:28 100260 HOLD WEST 09:12 ────────────────────────────────────────── Command ===> █ F1=Help F3=Exit F7=Bkwd F8=Fwd

01 · Headless 3270 engine

Signs on to your host over TN3270E with TLS and drives the existing screens, exactly as a user would.

02 · Each screen becomes an API

Fields on each screen are mapped to clean, typed API calls, with host validation carried through.

03 · A modern UI on top

Web, iPhone, iPad or desktop apps built around your staff's workflow rather than the screen flow.

Have a 3270 workflow in mind?

Tell Strovent about your host environment and the workflow you'd start with.

Start a conversationsupport@strovent.com