Invoice Simple review (UK, 2026)

Invoice Simple is a popular phone app for invoices, estimates and receipts, with 29k ratings on the UK App Store. We compared its pricing, features and user reviews on 12 October 2026 to see whether it is enough for a trade business, or whether you will outgrow it.

Who should buy Invoice Simple, and who should not?

Invoice Simple is an invoicing app, not job management software. It has no scheduling, job sheets, timesheets or certificates that we could find. That is fine if you only need invoices. It becomes a problem when you need to run the work as well as bill for it.

Invoice Simple key facts

What does Invoice Simple do well?

Fast invoices from your phone

You add your logo and bank details once, then build invoices from saved customers and items. Invoices go out by email, text, WhatsApp or PDF. You get an alert when the customer opens the invoice and when it is paid, which takes the guesswork out of chasing.

Estimates that turn into invoices

Invoice Simple says an approved estimate becomes an invoice "in 1-click". For a decorator or handyman pricing small jobs, that saves retyping.

Receipts and expenses

It also makes receipts and tracks expenses, and the expense data can be exported as a summary report for your bookkeeper.

A big, happy app user base

The UK App Store listing scored 4.8 from 29k ratings on 12 October 2026, and Invoice Simple claims more than 500,000 small business owners use it. The app itself is clearly easy to use.

Where does Invoice Simple fall short?

• Invoice caps. Essentials allows 3 invoices a month and Plus allows 10. A busy tradesperson will be on Premium almost straight away.
• Dollar pricing on the website. The pricing page only shows US dollars. UK buyers have to check the App Store or checkout to see pounds.
• No job management. No diary, scheduling, job sheets, photos per job, timesheets or staff tracking that we found.
• No UK certificates. Electricians and gas engineers will need a separate certificate app.
• No accounting sync found. You will retype invoices into Xero or QuickBooks, or export reports.
• Pricing complaints. Trustpilot reviewers mention subscription changes, new usage limits and price rises. One reviewer said they now pay "£60 for 3 invoices per month".
• US-first payments. ACH bank transfer and Venmo are US only. Stripe and PayPal are shown, but payment fees are not published.

How much does Invoice Simple cost?

We do not have a separate Invoice Simple pricing page, so here is the full breakdown.

The App Store also lists older subscriptions (from £9.99 to £17.99), so existing users may be on different prices. Capterra UK shows a starting price of US$13.49, which matches none of the current plans. Trust the App Store or checkout price.

Worked example: a sole trader sending 15 invoices a month

You would need Premium at £19.99 a month, or £239.88 a year. For comparison, ServiceM8's free plan covers 30 jobs a month at £0, and Tradify Lite costs £34 a month (£408 a year) but adds scheduling, job sheets and Xero, Sage or QuickBooks sync. If you only send 2 or 3 invoices a month, our free UK invoice template may be all you need.

Invoice Simple features in detail

Invoices and estimates

Custom logo, saved customers and items, discounts, tax rates, photos (Plus) and signatures (Premium). Deposits are on Premium, which helps on bigger jobs where you want money up front.

Payments

Customers can pay online. The website shows Stripe, PayPal, Visa and Mastercard logos, plus QR code payments in the app. Ask about card fees before you switch payments on.

UK VAT

You can set a tax rate, but we found no mention of UK VAT on Invoice Simple's pages. GOV.UK says every invoice must include a unique number, your business name and address, the customer's details, a description, the supply date, the invoice date, the amounts, the VAT amount if applicable and the total. If you are VAT registered, double-check your VAT number appears. Our free invoice templates include a VAT version.

Limits compared with job management software

A job app runs the whole job: enquiry, quote, booking, job sheet, photos, certificate, invoice and payment, with the office and the van seeing the same thing. Invoice Simple covers only the quote, invoice and payment. See our guide to quote and invoice software for trades for apps that sit in between.

What do users say about Invoice Simple?

The pattern is clear. People who rate the app in the store like how easy it is. People who write longer reviews on Trustpilot and Capterra are more critical, mostly about price changes, invoice limits and billing after cancelling. Trustpilot reviewers also praise the support team for quick replies.

Who is Invoice Simple best for?

• Part-time or side-business trades sending under 10 invoices a month: a good fit on Plus.
• Full-time sole traders: it works on Premium, but a trade app at a similar price does much more. ServiceM8 is free for up to 30 jobs a month.
• Teams of 2 or more: not a good fit. We found no staff scheduling or multi-user features.
• Electricians, gas and heating engineers: not a good fit, as there are no certificates.

Best alternatives to Invoice Simple

Thinking about the Joist app instead? Joist's pricing page shows Basics at $10, Pro at $17, Elite at $32 and Run at $70 a month in dollars, and its free plan has been withdrawn. We found no UK mention, so it has the same drawbacks as Invoice Simple for UK trades.