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Invoice Fly VS assertpy

Compare Invoice Fly VS assertpy and see what are their differences

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Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

Invoice Fly logo Invoice Fly

Invoice Fly is the best way to organize and run your home service business: Every feature you need - all in one place.

assertpy logo assertpy

A straightforward assertion library for Python.
  • Invoice Fly Send invoices in seconds
    Send invoices in seconds //
    2025-06-28
  • Invoice Fly Customize your invoices
    Customize your invoices //
    2025-06-28
  • Invoice Fly Get paid faster
    Get paid faster //
    2025-06-28
  • Invoice Fly build reports
    build reports //
    2025-06-28
  • Invoice Fly Get notified
    Get notified //
    2025-06-28

Invoice Fly simplifies billing and invoicing for small businesses and freelancers.

Create professional invoices and estimates in minutes, customize them to match your brand, and send them directly to your clients.

Get paid via PayPal or Stripe, and track payments. Available on desktop, Android, and iOS, Invoice Fly ensures you stay on top of your billing, no matter where you are.

Your Billing with the Best Invoice Template App Invoice Fly is an all-in-one business management app designed for contractors, freelancers, and home service professionals.

Invoice Fly helps you save time and get paid faster. Our intuitive mobile and desktop platform allows you to create professional invoices, track time, scan receipts, monitor expenses, and client communication from anywhere.

Trusted by over 125,000 active users and rated 4.8 stars on the App Store, Invoice Fly makes billing easy and mobile-friendly.

With features like instant invoice template generation, online payments (PayPal, Stripe, Apple Pay), and real-time job tracking, you can run your entire business from your phone.

  • assertpy Landing page
    Landing page //
    2022-11-06

Invoice Fly

Website
invoicefly.com
Pricing URL
Official Invoice Fly Pricing
$ Details
freemium $98.99 / Annually
Release Date
2023 June
Startup details
Country
United States
State
New York
City
New York
Founder(s)
Horacio Martos, Andrรฉs Bou
Employees
20 - 49
Edit details

assertpy

Website
github.com
Pricing URL
-
$ Details
-
Release Date
-
Categories
#Testing #Python
Edit details

Invoice Fly features and specs

  • Invoice Maker
    Create & send professional invoices in seconds
  • Receipt Scanner
    Scan your receipts and track your business expenses
  • Online Payments
    Get paid in seconds with Stripe and PayPal integrations

assertpy features and specs

  • Fluent API
    Assertpy offers a fluent API that makes assertions more readable and expressive, enabling developers to write assertions in a natural language style that is easy to understand.
  • Chainable Assertions
    It allows for chainable assertions, enabling multiple checks to be performed in a single line of code, thereby reducing verbosity and enhancing clarity.
  • Comprehensive Assertion Methods
    The library provides a wide range of built-in assertion methods, catering to various types of data validations, such as checking for size, type, value, and more.
  • Extensibility
    Assertpy supports extending its functionality by defining custom assertions, allowing developers to tailor it to their specific needs.
  • Pythonic
    Designed with Pythonic principles in mind, Assertpy fits seamlessly into Python projects, enabling idiomatic and consistent code style.

Possible disadvantages of assertpy

  • Learning Curve
    Developers new to the library may encounter a learning curve due to the distinct approach of using fluent and chainable assertions as opposed to traditional methods.
  • Limited by Python Version
    The library may have limitations in terms of compatibility with older versions of Python, requiring users to ensure their environment is up-to-date.
  • Performance Overhead
    The additional abstraction layer introduced by a fluent interface might introduce some performance overhead, especially in performance-critical or resource-constrained environments.
  • Less Community Support
    Compared to more established testing libraries, Assertpy might have less community support and fewer resources available for resolving issues or getting help.
  • Dependency Management
    Using a third-party library introduces additional dependencies to manage, which could complicate project maintenance and compatibility.

Analysis of Invoice Fly

Overall verdict

  • Invoice Fly is a solid, easy-to-use invoicing and estimating app well-suited for freelancers and small businesses that need to create professional invoices quickly on mobile or desktop.

Why this product is good

  • Simple, intuitive interface that lets you create invoices and estimates in minutes
  • Supports customizable templates so invoices look professional and branded
  • Available across mobile and web, enabling billing on the go
  • Includes useful features like payment tracking, tax calculation, and multi-currency support
  • Affordable pricing with a free tier suitable for solo entrepreneurs and small teams

Recommended for

  • Freelancers and independent contractors
  • Small business owners needing quick invoicing
  • Tradespeople and service providers who bill on-site
  • Startups looking for an affordable billing solution
  • Users who need to manage estimates and invoices from mobile devices

Analysis of assertpy

Overall verdict

  • assertpy is a well-regarded, lightweight assertion library for Python that provides a fluent, chainable API for writing readable and expressive test assertions, making it a solid choice for improving test clarity.

Why this product is good

  • Offers a fluent, chainable assertion syntax that makes tests more readable and self-documenting
  • Comprehensive built-in assertions for strings, numbers, lists, dicts, files, dates, and more
  • Produces clear, descriptive failure messages that speed up debugging
  • Lightweight with minimal dependencies and easy to integrate into existing test suites
  • Framework-agnostic, working seamlessly with pytest, unittest, and other test runners
  • Actively maintained open-source project with good documentation and community support

Recommended for

  • Python developers who want more readable and expressive test assertions
  • Teams using pytest or unittest looking to enhance assertion clarity
  • Projects that value descriptive failure messages for faster debugging
  • Developers coming from fluent assertion libraries in other languages (like AssertJ or Chai)
  • QA engineers and testers writing maintainable, self-documenting test code

Invoice Fly videos

+ Add

Invoice Fly App Review - Is It Worth It?

More videos:

  • Review - INVOICE FLY APP EXPLAINED - IS IT WORTH IT?
  • Review - Invoice Fly App Review (2025) โ€“ Honest Review: Is It Really Worth Using?

assertpy videos

No assertpy videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Invoice Fly and assertpy)

Invoice Fly

assertpy

Billing & Invoicing
100 100%
Billing & Invoicing
0% 0
Testing
0 0%
Testing
100% 100
Invoice Management
100 100%
Invoice Management
0% 0
Python
0 0%
Python
100% 100

Questions & Answers

As answered by people managing Invoice Fly and assertpy.

What makes your product unique?

Invoice Fly's answer

Modern looks and simple to use, user-friendly

Why should a person choose your product over its competitors?

Invoice Fly's answer

Because of its price and it's efficiency.

How would you describe the primary audience of your product?

Invoice Fly's answer

Freelancers, Small Business and Blue Collar Contractors.

What's the story behind your product?

Invoice Fly's answer

We developed this app focusing on helping workers and small business that need to accelerate their business growth and need a simple and efficient invoicing solution.

Which are the primary technologies used for building your product?

Invoice Fly's answer

Flutter, iOS and Android technologies, APIs and Integrations.

User comments

Share your experience with using Invoice Fly and assertpy. For example, how are they different and which one is better?
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What are some alternatives?

When comparing Invoice Fly and assertpy, you can also consider the following products

Zoho Invoice - 100% free online invoicing software for small businesses.

grappa - grappa is an declarative, verbose, and expressive assertion library for Python.

Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.

QuickBooks Online - QuickBooks Online is a Cloud Accounting for small business that can be used on iPad, mobile phone or computer to do invoicing, billing, run reports, or even pay employees online.

Invoice2go - Full featured, invoice and estimate solution with full mobile support.

FreshBooks - The ideal accounting software for small business owners.

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