Skip to main content
FYNORALAUNCH home

THIS SESSION · FINTECH · MONEY TOOLS

Flat Invoice vs Invoice Koi

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Flat Invoice compared with Invoice Koi
Detail Flat InvoiceInvoice Koi logo Invoice Koi
What it doesSend the invoice. Skip the chasing. Invoice app for contractors and the trades
StageNot given Not given
FoundedNot given Not given
Based inUS SG
Pricing modelFreemium Freemium
Pricing3 invoices per month free, then $2 per invoice. Pro plan: $9 per month or $79 per year for unlimited invoices. Edits, resends and reminders are free. Free to draft with no account needed. Subscription: US$9.99 per week (billed weekly) or US$99.99 per year (about US$8.33 per month, billed yearly). US App Store prices. Free trial included: two weeks free on annual plan, one week on weekly plan for eligible new iOS subscribers.
Key features
  • Automatic payment reminders on day 3, 7 and 14
  • Late fee calculator with interest calculation
  • Ready-to-send reminder email templates
  • Direct client payments
  • Optional Stripe integration for card and bank payments
  • Free edits and resends
  • Free late fee calculator tool
  • Unlimited invoice drafts on free plan
  • Unlimited invoices, estimates and receipts with subscription
  • Nine customizable invoice templates with logo and accent color
  • Price book for labor, material and hire rates
  • Receipt scanning with AI that reads merchant, amount, tax and category
  • Time tracking and jobs calendar that turn into invoice lines
  • Recurring invoices
  • Reports as CSV, spreadsheet or PDF
  • Portable backup file you own
  • Core invoicing works offline
  • Stripe payment collection with automatic payment recording
What makes it different
  • Never touches client payments or takes a percentage
  • Automatic reminders reduce payment chasing
  • Free late fee calculator included with service
  • Simple pricing with no setup fees
  • Works completely offline for core invoicing and PDF creation
  • No account required to start drafting and creating invoices
  • Saved clients and rates auto-fill invoices to save time
  • Estimate converts to invoice in one tap with no re-entry
  • Free to draft and subscribe only to send invoices
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check12 +1 (up) since last check
Trust Flow (Majestic)02
Citation Flow (Majestic)1221
Referring domains (Majestic)38

6 details filled in for both companies.

More alternatives to Flat Invoice More alternatives to Invoice Koi

Help centre