Billdu vs Invoice Simple (2026): which should you pick?
As of Nov 13, 2026, Invoice Simple grades higher than Billdu: 2.6 against 2.4 out of 4.0.
Checked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA
Billdu grades higher on value for money. Invoice Simple grades higher on ease of use. They get the same grade on the free plan, features and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Billdu
Invoice maker for freelancers and small businesses
Invoice Simple
Mobile and web invoice maker with monthly invoice caps
Which one is for you
Pick Billdu if
- Fits if you invoice a few clients and want expenses in the same app
- Works for people who want to try it free for a week with no card
Look elsewhere if
- Tight if you have more than 10 clients on Lite, or more than 50 on Standard
- Skip it if you need estimates or payment reminders on the cheapest plan: both start on Standard
- Watch out: the Xero connection and the API are Premium only
- Watch out: the prices on the page are the average monthly price of a yearly plan, and monthly billing costs $7.99 and up
Pick Invoice Simple if
- Fits if you invoice from your phone, between jobs
- Works for tradespeople who want invoices sent by text or WhatsApp
Look elsewhere if
- Tight if you send more than 3 invoices a month, since Essentials stops there and Plus stops at 10
- Pricey if you want unlimited invoices, which is $21.99 a month on Premium
- Watch out: prices here are the US App Store's monthly prices, and the web prices weren't checked
- Watch out: Venmo payments are US only, and the annual prices aren't published on the pages we read
How we grade them
| 2.4GPABillduFair | 2.6GPAInvoice SimpleGood | |
|---|---|---|
| Value for money | B$4.99 a month on yearly billing is inside the category's cheapest quarter, but Lite is capped at 10 clients. Estimates and reminders need Standard at $9.99. | C$6.99 a month in the US App Store buys 3 invoices. Unlimited invoicing is $21.99, near the category's middle plan. |
| Free plan and trial | CA 7-day free trial with all features and no card. There is no free plan. | CA 14-day free trial of Premium with no purchase needed. There is no free plan. |
| Features | CInvoices, estimates, reminders, expenses and recurring invoices. A smaller job than accounting: invoicing and expense tracking, with the Xero link and API on the dearest plan. | CInvoices, estimates, receipts, online and QR payments and read receipts. It does invoicing fully, which is a smaller job than accounting: no ledger. |
| Ease of use | CNo store rating on record, and you build your templates and client list first. | A4.9 from about 123,000 App Store ratings. Open it and make an invoice. |
| Platforms and integrations | BWeb plus iPhone, iPad and Android apps, with Xero and an API on Premium. | BWeb, iPhone and Android, with PayPal, Stripe and WhatsApp. No desktop app. |
| Best for | freelancers who need invoices and basic expense tracking | invoices from a phone |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Billdu and Invoice Simple. How we grade
Price against what you get
Billdu starts at $4.99 a month and scores 2.3 out of 4 on features, ease of use and platforms. Invoice Simple starts at $6.99 a month and scores 3.0.
Invoice Simple scores higher, and starts $2 a month higher: the question is whether the extra is worth that to you. Of the other accounting and invoicing tools on the chart, 7 score higher than Billdu for less, and 1 scores higher than Invoice Simple for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Billdu also covers expense tracking.
- Invoice Simple also covers templates.
At a glance
| Billdu | Invoice Simple | |
|---|---|---|
| Pricing | Free trial | Free trial |
| Starts at | $4.99 per month, billed annually ($7.99 billed monthly) | $6.99 per month, as listed in the US App Store |
| Free plan | None | None |
| Free trial | 7-day free trial with all features, no card required | 14-day free trial with Premium features, no purchase needed |
| Web | ||
| iOS | ||
| Android | ||
| Made by | Billdu Ltd | Zenvoice Inc. |
| Price read from | billdu.com | apps.apple.com |
| Checked | Nov 13, 2026 | Nov 13, 2026 |
Worth knowing
Billdu
- Lite is capped at 10 clients and Standard at 50; only Premium has unlimited clients.
- Estimates, quotes and payment reminders need Standard or higher.
- The Xero connection is listed only on Premium, and the API is Premium-only.
- Displayed prices are the average monthly price of an annual plan; the page says USD and EUR prices are the same.
Invoice Simple
- Essentials allows only 3 invoices a month and Plus 10; unlimited invoicing needs Premium.
- Prices here are the monthly in-app purchase prices in the US App Store, which list several legacy tiers; the vendor's own site blocked automated reading.
- The help center says annual plans get 2 months free, but gives no annual prices.
- Venmo payments are US only.
Key features
Billdu
- Invoices and estimates
- Create invoices on every plan; estimates, quotes and delivery notes start on Standard.
- Payment reminders and receipts
- Standard and Premium send payment reminders and receipts so unpaid invoices are chased from the app.
- Expense tracking
- Unlimited expenses on every plan, with a barcode scanner; recurring expenses are on Premium.
- Recurring invoices
- Premium can bill the same client on a schedule without recreating the invoice.
- Accountant and team access
- Team members, accountants included, count toward the plan's limit of 1, 2 or 10.
- E-invoicing by country
- The site lists e-invoicing pages for Spain (VeriFactu), Belgium (Peppol) and Slovakia (eFaktúra).
Invoice Simple
- Invoices, estimates and receipts
- Create documents on a phone or in a browser, turn an estimate into an invoice in one step, and add photos, discounts and signatures.
- Online and QR payments
- Clients can pay from the invoice by card, debit, PayPal or Venmo (US only), or by scanning a QR code printed on it.
- Read receipts and reminders
- See when a sent invoice was delivered and read, and send due-date reminders from message templates.
- Saved clients and items
- Frequently used line items and client details are stored so repeat invoices need less typing.
- Business summary reports
- Premium builds monthly and yearly income reports and shows top clients, with export to an accountant.
- Phone and browser apps
- Separate Android and iOS apps and a web app, so invoices can be made on the road or at a desk.
Plans
Billdu
Lite$4.99
per month, billed annually ($7.99 billed monthly)
Unlimited invoices and expenses for 10 clients and 1 user, with invoice status tracking and client signatures.
Standard$9.99
per month, billed annually ($14.99 billed monthly)
Adds estimates and quotes, delivery notes, payment reminders and receipts; 50 clients and up to 2 team members.
Premium$19.99
per month, billed annually ($27.99 billed monthly)
Unlimited clients, up to 10 team members, recurring invoices and expenses, API access and priority support.
Invoice Simple
Essentials$6.99
per month, App Store price; web price not checked
Up to 3 invoices or estimates a month, online payments, QR code payments and read receipts.
Plus$14.99
per month, App Store price; web price not checked
Everything in Essentials, up to 10 invoices a month, photos, signature, saved clients and items, due-date reminders.
Premium$21.99
per month, App Store price; web price not checked
Everything in Plus, unlimited invoices, client signatures, business summary reports and priority support.
Ways to pay less
Billdu
- Annual discount
Save up to 30% with an annual plan
Billdu says annual billing saves up to 30% against paying month to month.
Invoice Simple
- Annual discount
Annual plans get 2 months free
Invoice Simple's help center says subscribers to an annual plan are eligible for 2 months free.
Common questions
Which is cheaper, Billdu or Invoice Simple?
As of Nov 13, 2026, Billdu is cheaper to start with: $4.99 a month, against $6.99 a month for Invoice Simple. Billdu starts at $4.99 per month, billed annually ($7.99 billed monthly), and Invoice Simple starts at $6.99 per month, as listed in the US App Store.
Which has a free plan, Billdu or Invoice Simple?
As of Nov 13, 2026, neither Billdu nor Invoice Simple has a free plan. Both have a free trial.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.