Independent Software Studio · Est. Chicago
All Day Software logo

Software built the long way, so it works the short way. We make well-made software for ambitious small teams. A studio that ships like a team of ten, run by one.

All Day Software is a one-person studio pairing fifteen years of engineering practice with a fluency in modern AI tooling. Custom software, shipped products, and senior help for teams that don't need a ten-person retainer.

Start a project See selected work
Taking new projects · Q2 / Q3 2026 Chicago · Remote-friendly
Capabilities

If software can solve it, we can build it.

Web platforms, mobile apps, backend systems, internal tools, data & reporting, AI-assisted systems. Fifteen years across the stack — one person accountable for all of it.

  • Custom web platforms
  • iOS & mobile apps
  • Backend systems & APIs
  • Internal tools & dashboards
  • Data pipelines & reporting
  • AI-assisted systems
Case study

A social-impact platform for a Chicago nonprofit.

Case study / 001 ReVive Center, Chicago In production · 2025–2026

ReVive runs a homeless shelter and outreach program on Chicago's west side. We're building them the platform their mission deserves.

ReVive IMPACT is a comprehensive client-management platform — every interaction, outreach run, intake and goal — with HIPAA-grade audit logging, role-based access, and reports stakeholders actually read.

Work with us
ClientReVive Center
SectorNonprofit / Social services
EngagementCustom platform build
ScopeEnd-to-end platform build
ComplianceHIPAA audit trail

Contact log

Every interaction captured once, searchable forever.

Outreach ops

Locations, runs, inventory — field work made visible.

Client profiles

Multi-section intake and goal tracking with role-gated access.

Impact reports

Stakeholder reports generated from live data, not assembled the night before.

Products

When we're not shipping for clients, we're shipping for ourselves.

In development · iOS

LifeSigns

— a personal health coach, powered by MOSAIC

LifeSigns maps your life and tracks your health patterns — heatmaps, timelines, Apple Health — entirely on-device. Powered by MOSAIC, a hybrid ML engine fusing 115+ health, location and environmental signals into personal baselines. Zero cloud.

PlatformiOS — waitlist open
EngineMOSAIC · CoreML + PyTorch · hybrid ML
PrivacyPrivate, on-device · zero cloud
lifesignsapp.com
Live · iOS · macOS · Android

SplitterUp

— split expenses the smart way

Split expenses the smart way. AI receipt scan, bank import, and a settle-up algorithm that minimizes payments between friends.

PlatformiOS · macOS · Android
HighlightsAI receipt scan · bank import · smart re-split
PricingFree for life · first 1,000 users
splitterup.app Project details
Live · Web

MathWiz League

— competitive learning, scaled

Real-time multiplayer learning for schools. Live head-to-head matches, live leaderboards, teacher and admin dashboards — built and maintained solo.

PlatformWeb application
StackNext.js · PostgreSQL · Prisma
UsersLive in classrooms
mathwizleague.com Project details
Idea → production

Three shipped products. One person. Here's how fast.

<100days
Concept → App Store
SplitterUp — iOS, macOS & Android
Launched January 2026
1month
Zero → live
MathWiz League — live in classrooms
Launched June 2025
1month
Prototype → live
ReVive IMPACT — HIPAA-grade nonprofit platform
In production since 2025
About

Fifteen years at the keyboard, one person accountable.

I'm David Fritz, a Chicago-based staff engineer. All Day Software is fifteen years of large-scale systems practice meeting modern AI tooling.

For fifteen years I've built software that couldn't afford to break. I spent a decade at JPMorgan Chase on financial-reporting systems that Apple, Amazon, Amex, PayPal, and other Fortune 100 companies relied on to read their vital numbers. At Clearcover I worked across the insurtech platform as a fullstack engineer. At point.me, as lead engineer, I drove major revamps of the flight-search system and led the build of the price-alerts product while the company scaled from Series A to Series B.

Now I work for myself. I obsess over details. I don't take shortcuts I can't explain. The quiet thing nobody tells you about production-grade habits: they cost the same whether the system is massive or modest. Your project gets the same rigor either way.

How I work
P/01
Ships like a team, priced like one person.
Fifteen years of patterns plus modern tooling delivers scope a traditional shop quotes six figures for — without their overhead stack in the invoice.
P/02
Fixed-scope proposals. No hourly surprises.
You get a scope, a number, and a date before work starts. Changes get priced openly. The clock doesn't run while I think.
P/03
Weekly demos. Always.
Every Friday you see real software running on real data. If it's going sideways, you find out in week one — not month three.
P/04
Built to scale. Built to hand off.
The stack I'd use at a funded startup, documented the way I'd want to inherit it. Your repo, your cloud account, your code — day one.
Start a project

Let's build something good.

Tell me the problem, the timeline, the budget. I'll tell you whether I'm the right fit.

or connect on LinkedIn