84
BU Score
Excellent
Invoice Simple: Rechnung
✍️ BU Analytics Review
“
Invoice Simple: Rechnung is an iOS app from Zenvoice Inc. in the Business category, currently rated 4.9★ across 122,406 ratings. Initial signal reads as mostly critical sentiment so far — users flag rough edges and unmet expectations.
Our BU Score puts it at 84 — Excellent (strong product-market fit). For a Business app, that means strong product-market fit.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 15 of 15 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| High install base (122,406 ratings)METRIC | +$12,000 | |
| Paid app ($0.00)METRIC | +$2,800 | |
| Excellent rating (4.9★)METRIC | +$2,200 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| great valueREVIEW | +$1,600 | |
| cancelledREVIEW | −$1,500 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (12y old)METRIC | +$1,500 | |
| Multilingual (23 languages)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| too expensiveREVIEW | −$1,000 | |
| support teamREVIEW | +$900 | |
| priceyREVIEW | −$800 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Jun 25
Jul 25
Aug 25
Sep 25
Oct 25
Nov 25
Dec 25
Jan 26
Feb 26
Mar 26
Apr 26
May 26
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 199 MB🔞 4+📱 iOS 15.1+🔖 v6.2.0🔄 updated 1w ago🌐 CS, DA, NL, EN, FI +18📂 Business💰 Paid🚀 Launched 2013 (12y old)
📝 About this app
Easily create & send professional invoices, estimates, and receipts on the go! The perfect tool for individuals and growing businesses that lets you quickly create a document on the spot while with your customer.
For growing businesses who want:
· A simple way to make estimates, invoices, and receipts fast
· Professional-looking invoices that you can send from your mobile device
· An easy way to accept online payments and stop chasing checks
From a landscaping invoice or estimate to a receipt for entertainment supplies in your side gig, Invoice Simple is the app for your small business.
START YOUR FREE TRIAL
6 WAYS INVOICE SIMPLE MAKES YOUR LIFE AS A BUSINESS OWNER EASIER
1. SIMPLE TO USE
Designed to make sure you never have to waste time “figuring out” how to make it work.
2. INVOICE ANYWHERE
Standing next to your client, in your truck, or sitting at your desk, there’s no quicker way to send an invoice.
3. GET ORGANIZED
Keeping track is effortless. Your entire history is collected in one place, easy to find and read. Taxes are a breeze.
4. LOOK MORE PROFESSIONAL
Create professional-looking invoices and estimates on the spot.
5. GET PAID FASTER
Making it easy to get paid by accepting cards with simple fee structure and low rates that you can add to an invoice - no cost to you, as well as accept checks and cash.
6. INVOICE WITH CONFIDENCE
Join hundreds of thousands of small businesses who rely on Invoice Simple, consistently a top-rated invoicing app.
Easily customize every aspect of your invoice, estimate, or receipt:
1. Add your logo and business details
2. Include your banking details
3. Easy-add and import client details saved in your phone contacts
4. Customize tax and add discounts
5. Accept credit card payment with simple fee structure and low rates that you can add to an invoice - no cost to you, as well as accept checks and cash
6. Add product information and attach photos
7. Include your signature
Send your invoice or estimate by email, text, WhatsApp, or download it as a PDF. Get instant alerts when it's opened, paid, or is overdue with instant mobile device and email notifications.
You don’t have to limit yourself to cash and checks. Just select “accept online payments” and follow the simple steps to hook up your invoices to Invoice Simple Payments.
PLANS:
Start with a free trial, then choose the best plan for your business:
Essentials
For entrepreneurs to easily start sending estimates, invoices, receipts, and receive payments.
· Up to 3 invoices per month
· QR code payments
· Online payments
· Real time read receipts
· Expense tracking
· Top rated mobile and web apps
Plus
For small businesses to send nice-looking, easy to create documents on-the-go.
Everything in Essentials, plus:
· Up to 10 invoices per month
· Add photos
· Business owner signature
· Autofill client & item info
· Due date reminders
Premium
For small businesses to improve invoice organization and make online payments easy.
Everything in Plus, along with:
· UNLIMITED invoices per month
· Customer support 1st response priority
Invoice Simple, the ultimate invoice, receipt, & estimate maker: Send simple invoices using professional templates, invoice generator, PDF invoices and quotes, online payments, bill organizer, receipt and expense tracking, and business reporting—all rolled up into one easy-to-use app. When it's time to create an estimate, invoice, or receipt for your small business, Invoice Simple will work for you.
Terms of use: https://www.invoicesimple.com/terms
Privacy policy: https://www.invoicesimple.com/privacy
For growing businesses who want:
· A simple way to make estimates, invoices, and receipts fast
· Professional-looking invoices that you can send from your mobile device
· An easy way to accept online payments and stop chasing checks
From a landscaping invoice or estimate to a receipt for entertainment supplies in your side gig, Invoice Simple is the app for your small business.
START YOUR FREE TRIAL
6 WAYS INVOICE SIMPLE MAKES YOUR LIFE AS A BUSINESS OWNER EASIER
1. SIMPLE TO USE
Designed to make sure you never have to waste time “figuring out” how to make it work.
2. INVOICE ANYWHERE
Standing next to your client, in your truck, or sitting at your desk, there’s no quicker way to send an invoice.
3. GET ORGANIZED
Keeping track is effortless. Your entire history is collected in one place, easy to find and read. Taxes are a breeze.
4. LOOK MORE PROFESSIONAL
Create professional-looking invoices and estimates on the spot.
5. GET PAID FASTER
Making it easy to get paid by accepting cards with simple fee structure and low rates that you can add to an invoice - no cost to you, as well as accept checks and cash.
6. INVOICE WITH CONFIDENCE
Join hundreds of thousands of small businesses who rely on Invoice Simple, consistently a top-rated invoicing app.
Easily customize every aspect of your invoice, estimate, or receipt:
1. Add your logo and business details
2. Include your banking details
3. Easy-add and import client details saved in your phone contacts
4. Customize tax and add discounts
5. Accept credit card payment with simple fee structure and low rates that you can add to an invoice - no cost to you, as well as accept checks and cash
6. Add product information and attach photos
7. Include your signature
Send your invoice or estimate by email, text, WhatsApp, or download it as a PDF. Get instant alerts when it's opened, paid, or is overdue with instant mobile device and email notifications.
You don’t have to limit yourself to cash and checks. Just select “accept online payments” and follow the simple steps to hook up your invoices to Invoice Simple Payments.
PLANS:
Start with a free trial, then choose the best plan for your business:
Essentials
For entrepreneurs to easily start sending estimates, invoices, receipts, and receive payments.
· Up to 3 invoices per month
· QR code payments
· Online payments
· Real time read receipts
· Expense tracking
· Top rated mobile and web apps
Plus
For small businesses to send nice-looking, easy to create documents on-the-go.
Everything in Essentials, plus:
· Up to 10 invoices per month
· Add photos
· Business owner signature
· Autofill client & item info
· Due date reminders
Premium
For small businesses to improve invoice organization and make online payments easy.
Everything in Plus, along with:
· UNLIMITED invoices per month
· Customer support 1st response priority
Invoice Simple, the ultimate invoice, receipt, & estimate maker: Send simple invoices using professional templates, invoice generator, PDF invoices and quotes, online payments, bill organizer, receipt and expense tracking, and business reporting—all rolled up into one easy-to-use app. When it's time to create an estimate, invoice, or receipt for your small business, Invoice Simple will work for you.
Terms of use: https://www.invoicesimple.com/terms
Privacy policy: https://www.invoicesimple.com/privacy
🆕 What's New · v6.2.0
Welcome to the new Invoice Simple experience!
We've been working hard on improving our app's performance and stability while delivering the invoicing experience you expect with us.
Let us know what you think and feel free to contact our 24/7 support team if you come across any issues
- various bug fixes
We've been working hard on improving our app's performance and stability while delivering the invoicing experience you expect with us.
Let us know what you think and feel free to contact our 24/7 support team if you come across any issues
- various bug fixes
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Invoice Simple: Rechnung
- Developer
- Zenvoice Inc.
- Bundle ID
- com.logicalengine.qsei
- App Store URL
- Open in App Store
- Category
- Business
- Content rating
- 4+
- Languages
- CS, DA, NL, EN, FI, FR, DE, HU, ID, IT, JA, KO, MS, NB, PL, PT, RU, ZH, SK, ES, SV, ZH, TR
Company
- Website
- Not found
- Tagline
- Create & Send Customer Invoices in Seconds
- Description
- Send professional invoices from your phone or laptop. The simplest invoicing software you'll ever use. Create your first free invoice today!
- Founded
- 2014
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- OG image
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- $2.0MAI medium
- AI annual estimate
- $24.0M/yr
- ML model estimate / mo
- $22.4K/mo
- Top-grossing rank
- 🇬🇧#3 /100 🇫🇷#4 /100 🇦🇺#5 /100 🇨🇦#7 /100 🇺🇸#9 /100 🇮🇳#33 /100 🇩🇪#35 /100
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- https://twitter.com/InvoiceSimple
- https://www.linkedin.com/company/invoice-simple
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- https://www.invoicesimple.com/blog/
- Press / News
- Not found
Contacts & Socials
- Socials
- facebook · linkedin · twitter · youtube
- Not found
- Phone
- Not found
- Contact page
- https://www.invoicesimple.com/contact/
- About page
- https://www.invoicesimple.com/about/
✨AI Revenue EstimateCONFIDENCE: MEDIUM
The iOS app "Invoice Simple: Rechnung" by Zenvoice Inc. is estimated to generate approximately $2 million in monthly revenue, leading to an annual estimate of $24 million. This estimate is based on recent data from Sensor Tower for its performance in the US, United Kingdom, and Australia.
Sources mentioned: Sensor Tower, Growjo, Reddit, Wise, GetApp, PitchBook
Citations: sensortower.com
⭐Recent App Store Reviews49 latest · avg 1.98★ · 18.4% 5★ · 65.3% 1★
5★9 (18%)
4★1 (2%)
3★2 (4%)
2★5 (10%)
1★32 (65%)
+97 ratings/week
Praise: great ×10 recommend ×5 love ×4 best ×1Complaints: subscription ×10 expensive ×4 worst ×3 scam ×2 refund ×2
Top positive
★★★★★ Professional and easy
This app makes creating invoices and submitting them and tracking your finances just plain stupid easy. Everything looks as professional as you could ever want and it just makes it easy. Zenvoice nailed it!…
★★★★★ Simple to use and quick
Great program…
Top negative
★☆☆☆☆ The new upgrade system is fatally words
I was happy with this app, but after using the app more often the system decided to selling me the upgrade plan with out choice,the team can evenly leave me with the plus plan i have before they say the system is set up to collect more mone…
★☆☆☆☆ Keeps saying I have 0 invoices left
This used to be a great app until they did something in the backend because now I constantly keep getting a message that I have 0 invoices left when I pay monthly for unlimited. Keep in mind I pay for 2 accounts because I have 2 shops and e…
📈Ratings growth122,419 ratings+19% lifetimeShow 3-year history estimate ▾
Tracked (52 weeks) Pre-tracking estimate (32 weeks) · model-based, ±5% noise · anchored to release date and current value
🗺️Geographic Distribution●Top 10●Top 30●Top 60
🌍Top Countries — Grossing Rank8 countries
🇬🇧GB#3 /100
🇫🇷FR#4 /100
🇦🇺AU#5 /100
🇨🇦CA#7 /100
🇺🇸US#9 /100
🇮🇳IN#33 /100
🇩🇪DE#35 /100
🇧🇷BR#77 /100
📊Category Rank Trajectory#3 now · best #3 · worst #48
Lower line = better rank · Estimate from ratings growth model · Lower position on chart = worse rank · Higher = top of chart
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
More Business
ADP Mobile Solutions
★ 4.7 · 4,262,021 reviews
Indeed Jobs
★ 4.8 · 3,901,656 reviews
Microsoft Teams
★ 4.8 · 3,356,470 reviews
Zoom Workplace
★ 4.7 · 3,159,593 reviews
DoorDash - Dasher
★ 4.7 · 2,457,049 reviews
Duo Mobile
★ 4.9 · 2,095,068 reviews
Workday
★ 4.3 · 1,714,839 reviews
USPS Mobile®
★ 4.8 · 1,688,972 reviews
Browse BU Analytics
📚 All 55,000+ Books
🜍 Alchemy & Hermeticism
🔮 Magic & Ritual
🌙 Witchcraft & Paganism
⭐ Astrology & Cosmology
🃏 Divination & Tarot
📜 Business
✡️ Kabbalah & Jewish Mysticism
🕉️ Mysticism & Contemplation
🕊️ Theosophy & Anthroposophy
🏛️ Freemasonry & Secret Societies
👻 Spiritualism & Afterlife
📖 Sacred Texts & Gnosticism
👁️ Supernatural & Occult Fiction
🧘 Spiritual Development
📚 Esoteric History & Biography
Info
About BU Analytics