61 apps write an invoice on the phone, from 57 developers, two in the $250k+ band and seven more at $50–250k. Invoice Maker; Invoice Simple has led since September 2013 and adds 793 ratings a month on top of 122,662, while Invoice Maker - Invoice Fly runs the fastest pace of the 14 at 1,811 a month. Thirteen apps launched in the last 18 months and hold 3% of the review pace, and the highest band among them is $50–250k on 70 ratings. The one star reviews hit the plan that shrinks after the purchase: "per month" runs 21 times in two leaders behind paying reviewers the app cut to three invoices a month.
Appaloma readings · Invoice makers · 2026-09-01
- OpeningFewer newcomersOpen when a quarter or more of the niche launched in the last 18 months
- Demand90Revealed by rating velocity across the niche, 0–100
- Crowding67How much of the niche the top apps already hold, 0–100
- Apps6111 researched over $20k a month
- New13launched in the last 18 months, holding 3% of the niche's review pace
- Floor$1.2M+a month, adding the band floors of 61 researched apps
What the niche is
Type the client, the line items and the tax, then send a PDF by email or WhatsApp and mark it paid when the money lands. The same app prints the estimate before the job and the receipt after, and 11 of the 61 apps clear $20k a month on those documents. The buyer bills from the van: 11 of the 14 leaders surface on "invoice estimate contractor" and ten on "plumber invoice".
It sits under Invoicing, estimates & billing inside Small-business operations beside the quote builders that sell the estimate alone. Six of the 14 leaders hold a top grossing position. Four of the 14 leaders ship one app and nothing else, and app ideas for solo developers names 20 niches where a developer with one app clears $20k a month.
Who leads
| App | Since | Ratings | Stars | Prices | Band | |
|---|---|---|---|---|---|---|
| 1 |  Invoice Maker; Invoice SimpleZenvoice Inc. | Sep 2013 | 122,662 | 4.9 | $6.99–$21.99 | $250k+ |
| 2 |  Invoice Maker - Invoice FlyLabhouse Mobile | Feb 2022 | 97,661 | 4.8 | $8.99–$98.99 | $250k+ |
| 3 |  Invoice Maker ▸ Estimate AppGetPaid Inc. | Dec 2017 | 35,573 | 4.8 | $4.99–$17.99 | $50–250k |
| 4 |  Invoice Maker & Estimate AppBookipi Pty Ltd | Aug 2018 | 16,494 | 4.9 | $7.49–$129.99 | $50–250k |
| 5 |  Invoice Maker App -InvoiceBaseGulooloo Tech | Mar 2022 | 2,328 | 4.8 | $3.49–$79.99 | $50–250k |
| 6 |  Invoice MakerVladimir Pronin | Jan 2020 | 164 | 4.7 | $4.99–$99.99 | $50–250k |
| 7 |  Invoice Maker ・NVOICE MAKER Ltd. | Sep 2024 | 125 | 4.9 | $5.99–$89.99 | $50–250k |
| 8 |  InvoiceVladimir Pronin | Feb 2018 | 73 | 4.7 | $4.99–$49.99 | $50–250k |
| 9 |  Invoice Maker ™Artyom Avanesov | Jan 2026 | 70 | 5.0 | $12.99–$69.99 | $50–250k |
| 10 |  Easy Invoice Maker AppInvoice Generator s.r.o. | Jun 2021 | 27,256 | 4.9 | $5.99–$199.99 | $20–50k |
| 11 |  Free Invoice Maker & ReceiptEli Bitton | Sep 2021 | 2,109 | 4.8 | $4.99–$119.99 | $20–50k |
| 12 |  Freebie Invoice MakerInvoice Maker Pro s.r.o. | Oct 2021 | 10,776 | 4.9 | $5.99–$199.99 | $10–20k |
Band: our researched estimate of peak monthly revenue, published only for apps we have researched one by one. Every app in the catalog sits above the $5k a month floor.
Invoice Maker; Invoice Simple, from Zenvoice Inc., launched in September 2013 and holds 122,662 ratings at 793 a month, the oldest of the 14 and the only app its developer ships, steady at 1.0x in the $250k+ band with nine monthly plans from $6.99 to $21.99.
Invoice Maker - Invoice Fly, from Labhouse Mobile, launched in February 2022 and holds 97,661 ratings at 1,811 a month, the fastest pace of the 14 and the second app at $250k+, one of four from its developer. It charges $8.99 and $9.99 a week beside $17.99 a month and a $98.99 Premium tier.
Invoice Maker ▸ Estimate App from GetPaid Inc. goes back to December 2017 with 35,573 ratings at 342 a month and four weekly prices from $4.99 to $9.99. Invoice Maker & Estimate App from Bookipi Pty Ltd holds 16,494 ratings at 172 a month and 0.3x its own earlier pace, and Apple featured it in 2025 under "Level Up Your Business".
Easy Invoice Maker App from Invoice Generator s.r.o. holds $20–50k and rises to 1.1x on 27,256 ratings at 439 a month, the only leader above its own earlier pace. Freebie Invoice Maker from Invoice Maker Pro s.r.o. holds 10,776 ratings at $10–20k on the identical ladder, three monthly prices to $24.99 and three yearly to $199.99.
Four of the 14 leaders come from a one-app developer, including the $250k+ leader and both matching ladders, while Invoice Maker ™ from Artyom Avanesov, the newest at January 2026, holds $50–250k on 70 ratings.
Vladimir Pronin holds two of the 14 at $50–250k on 164 and 73 ratings and stopped updating both, Invoice Maker in October 2022 and Invoice in March 2021, two of the eight dormant apps against ten leaders that shipped in 2026.
How they make money
Thirteen of the 14 leaders charge by the month, $3.49 at Invoice Maker App -InvoiceBase up to $24.99 for Easy Invoice Maker's Premium tier, and 11 of the 13 land it between $9.99 and $14.99. Only Invoice Maker ・ skips the month and charges $5.99 a week against a $89.99 year.
Nine sell a yearly plan, $29.99 at Invoice and Invoice Maker up to $199.99 at Easy Invoice Maker App and Freebie Invoice Maker, where each year runs at roughly eight times its own month. Six charge by the week from $3.99 at Invoice Maker・Estimate App to $9.99 at Invoice Fly, and three sell a lifetime, Invoice at $48.99, Invoice Maker at $99.99 and Free Invoice Maker & Receipt at $119.99.
Invoice Maker App -InvoiceBase prices the trial as its own product: "Three Days Free Trial" at $79.99 and a 30% off version at $48.99 against $12.99 for its month.
The angles that get installs
- offline invoices, no login7 apps
- client signs the estimate on your phone3 apps
- bill for several businesses from one app2 apps
- tap to pay on the iPhone, no card reader2 apps
Seven of the 61 apps sell invoices that work offline with no login and the next angle runs in three. Three put the client's signature on the estimate before anyone leaves and three price the app by how many invoices you send a month, the structure the one star reviews attack 21 times in two leaders. Four more angles run in two apps each: tap to pay with no card reader, more than one business in one app, country tax rules and credit notes with proforma and delivery notes.
Three angles run in one app each: an invoice built from speech, an estimate from the job site and free until the user bills $1,000 a month.
What the one star reviews keep saying
“I’ve had this app for many years now. They keep rising their prices every month it seems now. Leaving the app now. Smh”Invoice Maker; Invoice Simple, 2026-05-27
“years now” recurs in 3 of the top 12 apps“This app offered me a free invoice, but somehow that disappeared, and I was in a time crunch, and had already entered all the info. So I surrendered and just paid the $7. I only needed one invoice. This was not a recurri”Invoice Maker; Invoice Simple, 2024-05-09
“free invoice” recurs in 3 of the top 12 apps“They make it almost impossible to cancel your subscription. It didn’t even show that I had an active subscription in the app. And there was no way to cancel through the app. I had to cancel on the website. I tried to del”Invoice Maker; Invoice Simple, 2025-03-27
“contact support” recurs in 3 of the top 12 apps“Its so helpful and makes everything easier to have organized builds a very nice invoice for you and your business. PROBLEM IS you pay $200 for the app subscription and you cant open the app on your macbook because the ap”Invoice Maker; Invoice Simple, 2024-12-08
“pay subscription” recurs in 3 of the top 12 apps“I really like the ease of use and the professional estimates and invoices created. however once I was logged out, I was unable to log back in and customer service was unable to help me. I need to get back to business and”Invoice Maker; Invoice Simple, 2024-10-03
“time money” recurs in 3 of the top 12 apps“It started good until they keep going up on price for the app and now limit the amount of invoices you can send per month unless you update to a $19.99 a month plan. Unacceptable!”Invoice Maker; Invoice Simple, 2026-07-21
“per month” recurs in 2 of the top 12 apps“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 reinst”Invoice Maker; Invoice Simple, 2026-05-31
“customer service” recurs in 2 of the top 12 apps
Phrases that recur in one and two star reviews across 8 of the niche's top 12 apps.
Eight leaders carry pooled reviews and three complaints run through them, two about a plan that changed after payment.
The price climbs and the invoice count drops. "Per month" runs 21 times in two apps, "small business" eight times in two, "number invoices" and "limited invoices" seven times each in two, and "years now" seven times in three. One reviewer went from $9.99 to $18 a month, another from unlimited to 10 invoices mid-term, and a third to three while paying.
The invoices a paying user made stop coming out. "Customer service" runs 21 times in two apps behind a buyer of the unlimited version who gets an error on every print and email, "credit card" nine times in two from a user with 1,200 invoices stuck after a switch to Stripe, and "time money" three times in three from people the app logged out and would not let back in.
The free invoice vanishes and the cancellation moves off the phone. "Free invoice" runs four times in three apps behind a reviewer who typed in every detail, lost the free one and paid $7 under a deadline. "Contact support" runs three times in three behind a user who found no active subscription in the app and cancelled on the website.
What works, from the five star side
"Invoice maker" runs 34 times in four apps and "works great" 20 times in six, from owners writing invoices on the phone beside the customer. "Easy invoice" runs 11 times in four, where an artist bills small commissions and says clients like the professional look.
New in the last 18 months
- InvoPlex: Simple Invoice MakerApr 2025 · 151 ratings · $5–10k
- Redbox Invoice MakerAug 2025 · 124 ratings · $5–10k
- Invoice & Receipt Maker: SmartJul 2025 · 109 ratings · $5–10k
- Invoice Maker App: InvyMay 2026 · 106 ratings · $5–10k
Thirteen apps launched in the last 18 months for 3% of the review pace, and four are past 100 ratings at $5–10k: InvoPlex: Simple Invoice Maker at 151 ratings from April 2025 down to Invoice Maker App: Invy at 106 after May 2026. Invoice Maker ™ runs ahead at $50–250k on 70 ratings eight months after January 2026.
Two cached ad hooks have run 133 days and still run: "The Easiest Way to Make Pro Invoices" and, on Invoice Maker App -InvoiceBase, "Free Easy Invoice Maker App for freelancer".
What to copy and what to avoid
Copy: the monthly plan, which 13 of the 14 leaders price between $3.49 and $24.99 while nine sell a yearly plan and six a weekly one.
Copy: invoices that open offline with no login, which seven of the 61 apps sell while "time money" runs three times in three leaders from users the app locked out of their files.
Avoid: cutting the allowance a paying subscriber bought, which draws 21 "per month" and eight "small business" mentions in two leaders.
Avoid: a cancellation that only completes on the website, where "contact support" runs three times in three leaders.
Our read: the one star pile turns on keeping invoices rather than making them, with 21 mentions of the monthly cap and 21 of support failing to restore printing against 34 five star mentions of the document in four apps.
Our read: the four entrants past 100 ratings stopped at $5–10k while Invoice Maker ™ reached $50–250k on 70 ratings in eight months, so the prices separate the bands more than the ratings count.
FAQ
Is the invoice maker app market saturated?
No. 61 apps from 57 developers, 13 of them launched in the last 18 months and hold 3% of the review pace, and 11 clear $20k a month as of September 2026. One January 2026 entrant holds $50–250k on 70 ratings and two leaders keep that band with no update since 2021 and 2022.
Which invoice maker apps make the most money?
Two sit in the $250k+ band as of September 2026: Invoice Maker; Invoice Simple from Zenvoice Inc. and Invoice Maker - Invoice Fly from Labhouse Mobile. Invoice Simple leads on ratings with 122,662 and has held the top since September 2013, while Invoice Fly adds them faster at 1,811 a month.
How do invoice maker apps make money?
Thirteen of the 14 leaders charge by the month from $3.49 to $24.99 and 11 of them land it between $9.99 and $14.99. Nine sell a yearly plan from $29.99 to $199.99, six charge by the week from $3.99 to $9.99 and three sell a lifetime from $48.99 to $119.99.
Do invoice maker apps limit how many invoices you can send?
Three of the 61 apps price by monthly invoice count and the reviews say the limits arrive after the purchase: "per month" runs 21 times in two leaders, with one reviewer cut to 10 invoices a month mid-term and another to three.
What should a new invoice maker app do differently?
Hold the invoice allowance the subscriber bought: "per month" draws 21 one star mentions in two leaders and "limited invoices" seven more. Let the saved invoices print and send without a login, which seven apps sell as offline invoicing while "customer service" runs 21 times in two leaders on failed prints. Finish the cancellation in the app, since "contact support" runs three times in three.