Invoice Simple is good at exactly one thing: making an invoice fast. But a job is more than a bill. SideWRK is built for solo tradespeople to run the whole thing — estimate, get it approved, schedule it, do it with photos, invoice, and get paid fee-free — from your phone, starting at $24/mo. Same simplicity, the rest of the job included.
| SideWRK | Invoice Simple | |
|---|---|---|
| What it does | The whole job — estimate → paid | Invoicing (& basic estimates) |
| Built for | Solo tradespeople running work | Anyone sending an invoice |
| Estimates + customer approval | Yes — approved from their phone | Basic estimates |
| Jobs & scheduling | Yes | No |
| Customer list | Yes | Client records |
| Photos on the job | Yes — before/after | No |
| Get paid | Fee-free to Venmo, Cash App, Zelle & Apple Pay + card | Card payments (processing fees) |
| Reviews & rebooking | Yes | No |
| Real-profit tracking | Yes | No |
Feature comparison per each product's publicly described capabilities (2026). Comparison reflects typical solo use; your needs may differ. Invoice Simple is a trademark of its owner; SideWRK is not affiliated with or endorsed by Invoice Simple.
Instead of typing an invoice from scratch, send an estimate the customer approves from their phone — then it becomes the invoice and the payment with nothing re-entered.
Customer, schedule, photos, notes, and what's paid all sit on the job — not scattered across an invoice app, your camera roll, and a notebook.
Get paid fee-free, then SideWRK asks for the review and makes rebooking easy — turning a one-off invoice into repeat work.
If you truly just need to fire off a quick invoice now and then and don't track jobs, schedules, or repeat customers, Invoice Simple does that well without any extra surface.
Invoice Simple is deliberately minimal. If a full job workflow feels like more than you need today, it's a fine place to start — and SideWRK is here when the invoice isn't the whole story anymore.
Your customers come with you. Export your client list from Invoice Simple (any CSV or spreadsheet works — even a screenshot or a photo of a handwritten list), then in SideWRK open Customers → Import and drop it in. Names, phones, emails, addresses, and notes land clean, with a preview and dedupe before anything saves. Your history stays yours: SideWRK exports everything back out in a click, so there's no lock-in on this side either.
Your money is never held. Payments go straight to you — Venmo, Zelle, or Cash App directly, or cards on your own Stripe account where you're the merchant of record. How that works →
No caps, no per-user fees. Unlimited jobs and invoices on every plan, and the working automation — deposits on approval, e-signatures, customer-choice add-ons, automatic payment reminders, receipt scanning, review follow-ups — is included, not held two tiers up.
The price you join at is the price you keep. Features you already have never move behind a new paywall.
Invoice Simple is invoicing-focused — great at making a quick invoice or estimate. SideWRK covers the whole job around the invoice: estimates customers approve from their phone, jobs and scheduling, a customer list, photos, fee-free payments, reviews, and real profit tracking. If you've outgrown just billing, SideWRK is the next step.
Yes. SideWRK is built for one-person trades and does everything a solo needs to run the work, not just send an invoice — estimate, schedule, do the job, invoice, get paid, and get the review, all from your phone for $24 to $89/month with no per-user fees.
Yes. SideWRK creates branded estimates your customer approves from their phone, then turns the approved estimate into an invoice and payment without re-entering anything. Invoice Simple can make estimates too, but SideWRK connects the estimate to the job, the schedule, and getting paid as one flow.
Get paid fee-free straight to Venmo, Cash App, Zelle, or Apple Pay with no merchant account, plus in-app card payments if a customer prefers a card. You track what's paid and unpaid per job, so you always know who still owes you.
Set up in minutes and send your first professional estimate today.
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