Invoice Koi is free to set up and draft in. Sending invoices, estimates and receipts needs a subscription: US$99.99 a year, or US$9.99 a week (US App Store prices). The browser invoice generator is free.

Does it work without a signal?

Yes. You can create invoices and PDFs offline. AI, cloud backup and payment collection require an internet connection.

Do I need an account?

No account is needed for core invoicing. You can sign in for cloud backup or payment collection. Payments also require Stripe setup; subscriptions use your store account.

What does Invoice Koi run on?

Invoice Koi runs on iPhone and iPad on iOS 16.4 or later. The free invoice generator on the website runs in any browser.

Which trades is it for?

Invoice Koi is for electricians, plumbers, general contractors, HVAC technicians, roofers, carpenters, painters, drywall and tile, flooring, landscaping, cleaning, handyman work and mobile mechanics.

Accounting & invoicing

Invoice Koi

Invoice app for contractors and the trades

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Also listed on

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Votes: 0
DR (Ahrefs): 12 +1 (up) since last check

Ahrefs Domain Rating reported 28 Oct 2026, restated 27 Oct 2026.

Mobile invoicing app for self-employed tradespeople that works offline, allowing users to draft invoices for free and subscribe to send unlimited invoices

Overview

Screenshot of the Invoice Koi homepage — A look at invoicekoi.com

Invoice Koi is an invoicing app designed for self-employed tradespeople and small service businesses such as electricians, plumbers, builders, and other contractors. Users can set up and draft invoices for free without creating an account, then subscribe to send unlimited invoices, estimates, and receipts. The app works offline for core invoicing functions, with features including nine customizable templates, a price book for labor and material rates, receipt scanning with AI, time tracking, and a jobs calendar. Subscriptions are available at US$9.99 per week or US$99.99 per year, both including a free trial. The app is currently available on Google Play and coming soon to the iPhone App Store.

Feature summary

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

Pricing

Pricing model: Freemium

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.

Invoice Koi metrics

Reported for invoicekoi.com: Ahrefs Domain Rating and Majestic link figures, with the movement since the prior report.

Domain Rating: 12; +1 (up) since last check
Trust Flow: 2; no change since last check
Citation Flow: 21; no change since last check
Referring domains: 8; no change since last check
External backlinks: 8; no change since last check

Ahrefs Domain Rating reported 28 Oct 2026, restated 27 Oct 2026. Principal topic: Computers/Software/Operating Systems (2). Majestic reported 25 Oct 2026, restated 25 Oct 2026. Link figures sourced from Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

Invoice Koi domain summary

Show the domain summary

Read from the public RDAP record on 27 Oct 2026, 11:45 UTC.

Domain age: 1 month
Registered: 4 Sep 2026
Expires: 4 Sep 2028
Registrar: NameCheap, Inc.
DNSSEC: Not signed

Detailed domain report: invoicekoi.com

Compare and explore

See the alternatives to Invoice Koi, Invoice Koi vs Inbox Ledger, Invoice Koi vs Enlivy, Invoice Koi vs Lejar, Invoice Koi vs Argo Books, FieldBase vs Invoice Koi, PaidInvoice vs Invoice Koi, more in Accounting & invoicing or startups in Singapore.

Q&A

Is Invoice Koi free?: Invoice Koi is free to set up and draft in. Sending invoices, estimates and receipts needs a subscription: US$99.99 a year, or US$9.99 a week (US App Store prices). The browser invoice generator is free.
Does it work without a signal?: Yes. You can create invoices and PDFs offline. AI, cloud backup and payment collection require an internet connection.
Do I need an account?: No account is needed for core invoicing. You can sign in for cloud backup or payment collection. Payments also require Stripe setup; subscriptions use your store account.
What does Invoice Koi run on?: Invoice Koi runs on iPhone and iPad on iOS 16.4 or later. The free invoice generator on the website runs in any browser.
Which trades is it for?: Invoice Koi is for electricians, plumbers, general contractors, HVAC technicians, roofers, carpenters, painters, drywall and tile, flooring, landscaping, cleaning, handyman work and mobile mechanics.

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