About this app
What Solostack does
Solostack is a 1-person business operating system for solo founders, indie hackers, freelancers, and consultants: invoicing, time tracking, expense capture, quarterly tax estimation, and a simple project board — in one app, on one phone, with one calm screen for today. What's in v1: — Today screen: invoices due, overdue, expenses captured this week, hours tracked, MTD revenue, MTD expenses, runway months. — Clients + projects: a simple two-level hierarchy. — Invoicing: one-tap from a time-tracked block or hand-entered amount. PDF generated on device. Status (sent / paid / overdue) with manual mark. — Time tracker: start/stop a project timer; rounds to 15-min increments. — Expenses: photo a receipt, OCR (on-device Vision) the total, tag it deductible. — Quarterly tax estimator: enter your state + filing status; Solostack projects safe-harbor 110%-of-last-year (or 90%-current-year, whichever lower) and shows your next quarterly due date. — Mileage log: tap-to-start drive, GPS distance (with permission), IRS-rate (free) calculation. Free. Optional Solostack Pro ($14.99/mo) adds Stripe/Square sync, multi-currency invoicing, recurring invoices, and the year-end Schedule C / 1040-ES export.
Features
Built to be useful, not noisy.
Today screen
Invoices, expenses, time, runway.
Invoicing
PDF on device, status flow.
Time + mileage
Start/stop timers, GPS mileage log.
Expenses + OCR
Photo a receipt; total extracted.
Quarterly tax estimator
Safe-harbor projection.
Why it exists
The problem
50M+ solo entrepreneurs globally (Statista). Existing tools are point-solutions: QuickBooks for accounting, FreshBooks for invoicing, Harvest for time, MileIQ for mileage, TaxJar for sales tax. The integrated 1-person OS at $15-30/mo doesn't yet exist on iOS at scale.
What's different
How Solostack stands out
Solostack is the only iOS app that bundles invoicing + time + expenses + mileage + quarterly tax estimator in one calm Today screen. QuickBooks is overkill; FreshBooks doesn't have mileage or quarterly tax; Bonsai exists but is desktop-first and weak on the phone.
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FAQ
Questions about Solostack
How much does Solostack cost?▾
Solostack is free. All features are included from day one — no subscription, no in-app purchases, no paid tiers. Everything you see in this listing works the moment you install it.
Where does Solostack store my data?▾
On your device. Solostack is built privacy-first: no account is required, no analytics SDKs, no third-party trackers. Nothing is uploaded to a server we control — the app works without one.
What platforms does Solostack support?▾
iOS, on iPhone and iPad. You can find the latest availability on this page.
How do I get support for Solostack?▾
Use the Support link on this page, or email support@allthingsn.com. We answer every message and keep responses on the same thread.
The story
Meet Solostack — The whole business in one app. No employees required
Read the full write-up · 3 min →
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