What is InvoiceKoi?

InvoiceKoi at a glance

InvoiceKoi and Invoice Koi are two spellings of the same invoicing product. Its official website is www.invoicekoi.com, and its own social accounts are @invoicekoi on Instagram and @invoicekoi on TikTok. The app and the free browser invoice generator are two ways to create an invoice.

• Available today: the US invoice generator and UK invoice generator create a PDF in your browser, with no account, watermark or upload of invoice details.
• Mobile app: Invoice Koi is on Google Play, and the iPhone app is in App Store review. The iPhone app requires iOS 16.4 or later.
• Subscription: Setting up your business and writing drafts is free. Issuing an invoice, estimate or receipt needs a subscription. Choose an annual solo plan at US$99.99 billed yearly (about US$8.33 a month), or a weekly solo plan at US$9.99 billed weekly (US App Store prices). US App Store solo prices. Prices and offers vary by country and store. Your local price appears in the app before purchase. On the UK App Store the same plans are £99.99 billed yearly (about £8.33 a month) or £9.99 billed weekly. Eligible new iOS subscribers: two weeks free on annual, one week on weekly. Nothing starts until you confirm the purchase. Without a trial, the displayed price applies immediately. Renews automatically until cancelled in your store account settings. Existing customers keep their promised core document access.
• With a subscription: unlimited invoices, estimates and receipts, all nine templates, time tracking, recurring invoices, reports, AI tools and photograph backup.
• If it ends: Your records stay yours. After expiry, view, export or resend issued records and record or collect outstanding payments. New documents need a subscription or eligible trial, except where existing access is preserved.
• Offline use: core invoicing and PDF creation work on the phone. AI, cloud backup and payment collection need an internet connection.
• Do I need an account? No account is needed for core invoicing. Sign in for cloud backup, a second device or payment collection. Payments also need Stripe setup. Subscriptions use your App Store or Google Play account.
• Payment fees: Koi charges 0.35% on payments collected through it with a subscription, or 0.7% + 0.10 in the payment currency without one, plus Stripe processing fees. Zero-decimal currencies have no fixed part, and payments you record yourself have no Koi fee. See plans and payment fees.

An invoice written where the job was done.

Invoice Koi helps self-employed tradespeople finish invoices where they work, so paperwork does not follow them home.

Create invoices, calculate totals and export PDFs on your phone, even without a signal. AI, cloud backup and payment collection need an internet connection.

Built by Fang in Singapore.

Fang builds software around everyday work. Invoice Koi focuses on invoicing for people who work on site.

Our comparisons with 12 apps include sources, review dates and each competitor's strengths. Features a vendor does not describe are marked as not stated.

Sharing, payments and your data.

Share invoices as PDFs through your own email or messaging app. You choose when to send. A payment made through a Koi payment link marks the invoice paid on its own. Cash, bank transfers and anything paid elsewhere, you record yourself. Invoice Koi has no bank feed.

Export reports as CSV, spreadsheet or PDF. Keep your own backup file and import it on another phone.

Contact the team.

For support, email support@invoicekoi.com. For partnerships or distribution, contact Fang at wj@fangv.xyz. Fang also builds Intriq, a relationship memory app.

Invoice Koi editorial is the product team's blog byline. Send corrections to the support address above.