Verithiathe honest score on any app
Updated July 2026 · real, multi-region App Store reviews
Head-to-head

Invoice Simple vs Billdu

Invoice Simple 4.9★ · Free + IAP 65
Winner Tie
Billdu 4.8★ · Free to download 60

Invoice Simple is generally preferred for its ease of use and features, but both apps suffer from significant reliability and customer support issues, making neither a clear winner for consistent long-term use.

Full reviews: Invoice Simple · Billdu

Invoice Simple and Billdu both offer easy invoice creation for small businesses, but recent reviews for both highlight major problems with price increases, bugs, and unresponsive customer support. While Invoice Simple has a higher lifetime rating and more features, its recent issues with pricing and reliability are pushing users away, similar to Billdu's struggles.

Head to head

Features edge: Invoice SimpleR2R5R11R14
Invoice Simple Invoice Simple is praised for being a powerful and easy-to-use invoice maker, offering features like SMS text messaging for invoices, integration with Stripe and PayPal, and the ability to create quotes R2R14R17. Users appreciate its professional appearance and ease of tracking finances . However, some users desire more advanced options like adding different selections to estimates R11, recurring invoices , and a more efficient item library . There are also complaints about new bookkeeping features having bugs R5 and the dashboard being cluttered and inaccurate R27.
Billdu Billdu is loved for keeping everything organized, from deposits to sending thank you notes, acting like a 'secretary' . Users find it easy to understand and use for on-site billing . It is also praised for making invoices and quotes . However, some users need features like customer signatures on estimates and the ability to use both CIS and VAT simultaneously on invoices . There are also complaints about the app not allowing attachment of pictures without crashing .
Ease of Use edge: Invoice SimpleR2R17R20R27
Invoice Simple Invoice Simple is widely praised for being simple, easy to use, and quick for creating invoices and estimates R2R20. Users appreciate its straightforward interface for small businesses R17. However, some find the dashboard confusing and cluttered R27, and one user couldn't create an invoice without a full address, finding it incredibly irritating .
Billdu Billdu is described as easy to understand, simple to use, and fast for making invoices . Users find it great for on-the-go invoicing . Conversely, some users find the app complicated and prone to interruptions .
Reliability tieR1R4R8R24
Invoice Simple Invoice Simple has significant reliability issues, with users reporting problems printing or emailing invoices and estimates R4R8. Invoices often require multiple attempts to save R1, and some users cannot log in or access their saved invoices . There are also complaints about exported PDFs not matching previews , estimates having incorrect calculations and duplicating items R24, and invoices ending up in spam . Some users experience the app saying they have 0 invoices left despite paying for unlimited .
Billdu Billdu also suffers from major reliability problems. A frequent complaint is that client names disappear from invoices and estimates, especially after edits or sending . Users have reported losing entire estimates or all invoices and payments due to crashes . The app is described as slow, glitchy, and prone to crashing .
Price/Value tieR1R3R7R10
Invoice Simple Invoice Simple users are highly frustrated with frequent and significant price increases, with subscriptions rising from $99 to $219.99 R1R3R10. Many long-term users feel the value has diminished, especially with reduced invoice limits for paid tiers R1R7R15. Some users who paid for unlimited invoices now face additional charges or limits R7. The app is considered expensive for what it offers, especially for low-volume users .
Billdu Billdu is also criticized for being pricey, with subscriptions reaching nearly $30 a month R66. Users complain about features being moved to separate paid apps and limits on the number of clients, forcing them to pay more . Some feel the value isn't there anymore, especially after price hikes .
Customer Support tieR3R4R13R16
Invoice Simple Invoice Simple's customer service is widely criticized as terrible and unresponsive R4R13R16. Users report long waits for fixes, with some issues remaining unresolved for weeks or months R4R13R16. Many interactions are with AI bots, leading to frustration and no real solutions . There is no customer service phone number R3.
Billdu Billdu's customer support is also described as non-existent, horrendous, or painfully slow . Users report chat crashing the app , being stuck with AI bots , and waiting hours for responses . There is no customer support phone line .
Pick Invoice Simple if

you need a powerful, easy-to-use invoice maker with features like SMS invoicing and payment integrations, and you are willing to tolerate frequent price increases and potential bugs R2R14.

Pick Billdu if

you prioritize an organized system for deposits and payments, find its interface easy to understand, and are comfortable with a mobile-first approach for your business .

Evidence note: Both apps have a significant number of recent negative reviews focusing on similar issues: price increases, bugs, and poor customer support. While Invoice Simple has a much larger user base and a slightly higher lifetime rating, the recent sentiment for both is largely negative, indicating a decline in user satisfaction.

Frequently asked

Are Invoice Simple and Billdu free to use?
Invoice Simple offers a 'Free + IAP' model, but many users report that the free tier is very limited (e.g., 3 invoices per month) and that the app frequently pushes paid subscriptions with significant price increases R1R7R15. Billdu is 'Free to download' but also has subscription costs, with users complaining about prices reaching nearly $30 a month and limits on clients or features requiring more payment R66.
Do Invoice Simple and Billdu have good customer support?
No, both Invoice Simple and Billdu receive widespread criticism for their customer support, with users reporting unresponsiveness, long waits for fixes, and interactions primarily with AI bots rather than human assistance R4R13R16. Neither app appears to offer a direct customer service phone number R3.
Are there recurring issues with Invoice Simple or Billdu?
Yes, both apps have recurring issues. Invoice Simple users frequently report problems with price increases, reduced invoice limits for paid users, difficulties saving or sending invoices, and bugs in new features or PDF exports R1R4R7R8. Billdu users consistently complain about client names disappearing from invoices after edits, lost estimates, and the app being slow or glitchy .

What reviewers actually said

Built only from these 120 real reviews (foreign ones translated). Superscripts jump to the quote here. Apple has no per-review links, so [ref] opens that app's reviews on the App Store.

  1. [R2] Invoice Simple 5/5 · US This app is easy to use: Like they said simple invoice maker,so powerful and I save the paper
  2. [R5] Invoice Simple 5/5 · US Awesome app: Great app, seems like there is some bugs on the new bookkeeping feature hopefully they can address that soon. It would be awesome to track all my expenses through one app
  3. [R11] Invoice Simple 4/5 · US Options on estimates: App is great just would be better if there was a way to add different options to estimates. For example different options for the customer to select on the estimate. I do HVAC and to send 3 different estimates is a pain.
  4. [R14] Invoice Simple 5/5 · US TIRES DIRECT INTERNATIONAL: I would recommend Invoice Simple to anybody who has a business or starting out. I’m a tire mobile installer and been looking for an Invoice company where I can send my customers immediate pricing etc. most company don’t offer SMS text messaging only by email but Invoice does. This makes closing the sales more attainable rather than a prolong email and awaited response.
  5. [R17] Invoice Simple 5/5 · US Great experience: For small business owner works great giving the opportunity to create invoices and quotes remotely from Your phone
  6. [R20] Invoice Simple 5/5 · US Easy to use: I find this app interesting and easy to use
  7. [R27] Invoice Simple 3/5 · US Dashboard makes no sense: The dashboard is an absolute mess. You’d think it would show key metrics at a glance, outstanding invoices, top clients, month-to-date incọme. Nope. Instead, it’s just cluttered boxes and graphs that don’t even update correctly. 🧱 Half the time, the totals are wrong, and the layout changes after every update. It’s like they’re trying to confuse you. I don’t need flashy vis
  8. [R1] Invoice Simple 1/5 · US Terrible!: I have had this app since 2018 It’s impressive how bad this app has become. -They keep raising the price of the app -They have now reduced the amount of invoices I can make each month so it’s not viable for an actual business -I have to modify invoices several times to get them to save (took 10 mins and 8 attempts to mark an invoice as paid) Very disappointed, at one point this a
  9. [R4] Invoice Simple 1/5 · US Terrible customer service: I have used this app for years and also purchased the unlimited version. But as of 2 months ago I can no longer print or email any invoices/ estimates to my clients. All I get is an error message. I’ve deleted and reinstalled the app a dozen times now and it’s the same thing everytime. I’ve reached out to customer service a few times now and all they say is the back end
  10. [R8] Invoice Simple 5/5 · US Major bug: Something is wrong it won’t let me print or send pdf every new invoice or estimate I have to delete and download the app to send each invoice or estimate
  11. [R24] Invoice Simple 3/5 · US Estimates feature broken: I tried using the estimates function to send quotes before invoicing, and it’s a cọmplete mess. Numbers don’t calculate right, discounts get dropped, and converting to invoice just duplicates everything. 😮‍💨 I’ve had clients call me confused because they got two totally different totals for the same job. That’s not how you build trust in a business relationship. Plus, for
  12. [R3] Invoice Simple 3/5 · US App is good but: The app is good, support is ok when it goes down, no customer service phone Have been using it for 4 years and every year a price increase started at $99.00 then 149.99 and now $219.99 a 47 percent increase (Crazy)especially for a small business
  13. [R7] Invoice Simple 1/5 · US Greedy: I’ve been paying for this app for years. They recently reduced the number of invoices per month to THREE. That’s PAID. The upcharge is ridiculous. This doesn’t need to be a subscription in the first place. It’s a static tool. They already try and push you to use their billing services and take a cut. Now they’re pushing the subscription tiers by reducing offered services to existing users.
  14. [R10] Invoice Simple 1/5 · US Prices to high: I’ve had this app for many years now. They keep rising their prices every month it seems now. Leaving the app now. Smh
  15. [R13] Invoice Simple 1/5 · US DON’T BUY: No support. Been waits weeks for them to fix a problem they acknowledged
  16. [R16] Invoice Simple 1/5 · US Wolfe: What ever you do don’t buy the Invoice Simple. I’ve given them more then a month to fix an issue & it still hasn’t been fixed. They don’t have any back end support. Which means if you have a problem they have no way to fix it. I’ve had the app since 2018. Running 2 companies with it. Recently I had multiple problems with it over a several week period. I made them aware of it with over a d
  17. [R15] Invoice Simple 3/5 · US They have become money hungry:(: Rating, is based on New pricing! Extremely expensive I start back in 2022 with Invoice and definitely made my life easier to make invoices and keep track. As everything, every year it’s a new charge, mind you I already pay $135 a yearly subscription to get the best option out there. But now, in order to use it more than 10 times a month, you must pay $200+ dollar
  18. [R66] Billdu 3/5 · US Great app, but little pricey: I like the app but it is a bit expensive and has some minor issues, but makes onsite billing easy.

Synthesized from 120 recent App Store reviews · updated July 2026 · View on the App Store