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Aviy vs Invoice Simple - AI invoicing vs template-only forms
Invoice Simple is a mobile-first template tool: pick a layout, fill the boxes, send. Aviy does the same job in one sentence with AI, on web and mobile, with six document types, multi-channel send, and a permanent free tier. If you bill more than once a month, the speed gap is the whole story.
Feature comparison
| Feature | Aviy | Invoice Simple |
|---|---|---|
| AI invoice creation | Native. Type "Invoice Acme £1,500 website design due Friday" and the doc is finished. | No AI. Manual form-filling on every invoice. |
| Free tier | Free forever - 4 saved documents on Basic, full editor, all six doc types, four templates. | Free download but limited free invoices; full features paywalled. Each invoice carries "Made with Invoice Simple" branding. |
| Document types | Invoices, estimates, quotes, credit notes, receipts, purchase orders - all six native. | Invoices, estimates, receipts. No credit notes or purchase orders. |
| Templates | Four modern templates (Classic, Modern, Bold, Minimal) with full brand customisation: logo, colour, signature, per-business defaults. | Five fixed templates, limited customisation. |
| Multi-channel send | Email, WhatsApp, SMS, Telegram, Slack, Messenger, iMessage - create + send from chat without leaving the app. | Email and SMS only. |
| Online payments | Stripe + PayPal - keep your own processor accounts. Bank transfer + mark-paid via /view. | Stripe + PayPal via in-app integration. |
| Web + mobile | Native web (aviy.ai) AND iOS/Android apps - the same account everywhere, real-time sync. | Mobile-first - web app is limited; key flows require the phone app. |
| Multi-currency | Every major world currency, native, on every plan. | Supported on paid plan. |
| Recurring invoices | Included on paid plan, scheduled by Aviy and run automatically. | Included on paid plans. |
| Magic-link viewer | Recipients open a clean /v/<token> page - view, download PDF, request changes, pay online. No app install required. | PDF attachment in email. Recipient has nowhere to act on the doc. |
| Brand removal | Branding removed on every paid plan (Starter and up). | Branding only removable on Premium plan. |
| AI document editing | Say "change the due date to Friday next week" - Aviy edits the doc. Same AI you used to create it. | Open the form, find the field, type, save. Every time. |
Choose Aviy when…
- You want to create + send an invoice in under a minute from your laptop OR phone.
- You bill clients more than 4-5 times a month and want AI to do the typing.
- You need credit notes or purchase orders - documents Invoice Simple does not support.
- You want to send via WhatsApp, Telegram, or SMS in addition to email.
- You want a real free tier that does not paywall the basics.
- You need a recipient-facing portal where clients can view + pay + request changes.
Frequently asked questions
How fast is Aviy compared to Invoice Simple?
About 5-10x faster on a single invoice. In Aviy you type "Invoice Acme Inc £1,500 website design due in 7 days" and the AI fills the entire document - client, line items, amount, due date, taxes, branding - in seconds. In Invoice Simple you open a form and fill each field by hand. Multiply that by 20 invoices a month and Aviy gives back an evening every week.
Does Aviy work on mobile like Invoice Simple does?
Yes - iOS and Android apps with the same AI invoicing and the same magic-link send. Unlike Invoice Simple, Aviy is web-native too, so you can create on your laptop and finish on your phone in the same session with real-time sync.
Can I migrate my invoices from Invoice Simple to Aviy?
Yes. Export your Invoice Simple history as CSV, then import into Aviy. The smart import recognises Invoice Simple's column names and rebuilds client + invoice records with the original numbering preserved.
Is Aviy cheaper than Invoice Simple?
Yes for most users. Aviy is free forever for up to 4 saved documents with no time limit and no feature gating. Invoice Simple charges per active month once you exceed its free invoice cap. Aviy paid plans for unlimited storage and recurring invoices undercut Invoice Simple's Premium tier.
Do Aviy invoices look professional?
More polished than Invoice Simple's templates, in our opinion. Four hand-designed templates with proper typography, brand colour control, logo + signature handling, and a high-resolution PDF render via Cloudflare Browser Rendering - the same engine used for legal-grade documents. Recipients open the magic link and see a real branded page, not a phone screenshot.
What about offline use?
The editor saves drafts to your browser's local storage and works offline. When you reconnect, Aviy syncs. Invoice Simple is similar on mobile. Both handle offline fine.
Why use Aviy if Invoice Simple is "simple enough"?
Simple as in "few options" is fine when you bill once a month. Simple as in "I describe the work and the invoice exists" is a fundamentally different speed of business. Once you create an invoice in one sentence, going back to a form feels like going back to typing addresses into a 2008 GPS.
Try Aviy free
See how the AI invoice generator works for your business. Free to start. No credit card. Sub-minute first invoice.