NumberLingo

Run the everyday paperwork of your small business without turning it into a complicated accounting project.

NumberLingo brings invoices, business expenses, document scanning and practical converters together in one clear app. No account is required to start.

WHO NUMBERLINGO HELPS

• Landlords can reuse a rent invoice and plan monthly, quarterly, six-monthly or yearly billing. Each due date creates a draft to review before sending
• Plumbers, tradespeople, consultants and freelancers can create branded invoices with tax, discounts and payment details such as IBAN/BIC, PayPal or a Stripe payment link
• During a business trip, photograph each receipt, verify the suggested details and keep the proof attached to the expense for your accountant

INVOICES MADE SIMPLE

• Create professional customer invoices step by step
• Save customers and reuse their details on future invoices
• Add items, discounts, VAT or tax, notes and payment instructions
• Add your company logo, signature and stamp
• Preview the finished invoice before saving it
• Export, share, duplicate and track draft, sent, paid or overdue invoices
• Spell the total amount in words when your documents require it

EXPENSES READY FOR ACCOUNTING

• Photograph or import a receipt directly from an expense
• Let receipt recognition suggest the merchant, amount, date and category
• Review every suggested field before saving
• Keep the supporting document attached to the expense
• Filter, open, share or delete individual expenses

DOCUMENT SCANNER

• Scan clean, cropped documents with the rear camera
• Combine several pages into one document
• Save and share PDF or JPG files
• Find recent scans inside the app

USEFUL CONVERTERS

• Write numbers and amounts in words in several languages, including amounts for cheques
• World currency and cryptocurrency conversion with the update time shown
• Cached exchange rates remain available when the network is unavailable
• Length, area, weight, volume, temperature, speed and more
• Conversion history and favorites for quick reuse

DESIGNED FOR REAL WORK

• Clear four-tab navigation: Home, Invoices, Tools and Account
• English, French, Spanish and Brazilian Portuguese interface
• Voice input on useful form fields
• Light and dark themes
• Layout adapted to small screens and recent Android edge-to-edge displays

FREE AND PRO

The free version remains genuinely useful: essential converters, reference-rate conversion for 68 currencies and 16 major cryptocurrencies, document scanning and up to five invoices per calendar month with the Classic template are available without a subscription. Free invoice PDFs include a discreet “Generated with NumberLingo” footer.

NumberLingo Pro adds more currencies for amounts in words, rate alerts for currency and crypto pairs, 34 additional cryptocurrencies for rate conversion, five additional invoice templates, unlimited invoicing without the NumberLingo footer, recurring invoice planning, accounting ZIP export with receipts and an ad-free experience. NumberLingo only converts reference rates; it is not a crypto exchange or trading service. Monthly and annual subscriptions are managed securely through Google Play and can be cancelled there at any time.

PRIVACY

Your invoices, clients, expenses, receipts and scans are stored locally on your device. NumberLingo does not require an account. You can delete individual records or erase local app data from Account. The free version may display ads; consent controls are shown where required.

NumberLingo helps micro-businesses spend less time on paperwork and more time on their work.