|Operating system||MS-DOS, Apple II, Windows, Classic Mac OS, macOS, iOS, Android|
|Type||Personal financial management software|
Quicken is a personal finance management tool developed by Quicken Inc. (formerly part of Intuit, Inc.). On March 3, 2016, Intuit announced plans to sell Quicken to H.I.G. Capital; terms of the sale were not disclosed. On October 1, 2021, H.I.G. sold Quicken to Aquiline Capital Partners.
Different (and incompatible) versions of Quicken run on Windows and Macintosh systems. Previous versions ran on DOS and the Apple II. There are several versions of Quicken for Windows, including Quicken Starter, Quicken Deluxe, Quicken Rental Property Manager, Quicken Premier, and Quicken Home & Business, as well as Quicken for Mac. Since 2008, each version has tended to have the release year in the product name (e.g., Quicken Basic 2008); before then, versions were numbered (e.g., Quicken 8 for DOS).
Quicken's major marketplace is North America, and most of the software sold is specialized for the United States and Canadian marketplace and user base. However, the core functions can often be used more widely, regardless of the country; versions have been tailored for a variety of marketplaces, including Australia, Germany, Hong Kong, India, New Zealand, the Philippines, and Singapore. Development of the UK-specific version of Quicken was stopped in January 2005, with sales and support ending shortly afterwards. There were also versions for Argentina, Brazil, Chile, Colombia, Costa Rica, Denmark, Ecuador, France, Mexico, the Netherlands, Spain, Sweden, Switzerland, Uruguay, and Venezuela.
The Quicken name typically refers to the core product offering of personal financial management software. The software includes financial planning activities that, historically, people may have done on paper – recording banking transactions, planning a budget and measuring progress against it, tracking investments and their prices and performance. Quicken has offered various editions, with varying prices – such as Basic which includes only those typical activities for someone with simple banking accounts, to Small Business for someone who also runs a business out of their home.
Quicken includes online services that allow users to retrieve transactions from various providers – such as their bank or credit card company. In most cases, online services and technical support are now supported for up to three years after the product's labeled version. e.g. Quicken 2018 will be supported until 2021.
The Quicken brand has been extended to other personal and household areas, including healthcare. Most of the extra applications are now defunct. Quicken Health Expense Tracker was a free online tool for healthcare consumers enrolled in participating health plans. Users could "manage and direct their health care finances, view and organize medical expenses, payments and service histories, and download and organize personal health claims data." The Quicken Medical Expense Manager was a desktop software tool for managing healthcare paperwork, tracking claims and payments, and consolidating related information.
Quicken Kids & Money was a Web-based program that aimed to help parents teach five- to eight-year-old children how to earn, spend, save, and share money. It is defunct.
Other products are aimed at home business and seem to fit in a space for a less formal business than would be using QuickBooks. Quicken Home, Business, and Rental Property Manager is a high-end version of Quicken for managing rental properties; tracking tenants, expenses, and payments; and producing tax reports.
Quicken Online was a free, hosted solution (see software as a service) by Intuit. Intuit hosted all of the user's data, provided patches and regularly upgraded the software automatically. Initially, this was launched as a monthly paid subscription, and was a free service for over a year.
Beginning with Quicken 2018, Quicken became a subscription service. Annual memberships can be purchased directly from Quicken.com and two-year subscriptions can be purchased through several retailers.
The following are current (selling and supported) and retired (discontinued in both sales and support) versions of Quicken.
(Dates support ends are shown.) 
(Dates retired are shown.) 
Intuit stopped supporting its Quicken software in the United Kingdom in 2005, leaving many thousands of users with only partly functional software.
In 2008 and 2009, Quicken users reported an unusually large number of software bugs for a commercial product. A review of Quicken 2010 suggests that quality and user interface in that product year is dramatically improved.
Existing Quicken Online users' data is not transferable/importable into Mint.com. This is in direct contrast to VP Aaron Patzer's promise, made on April 27, 2010: "[Until the merger with Mint.com is complete], you can continue to use Quicken Online just like you have. Once we have completed integrating all features to Mint, you will be able to easily transfer your information and data to ensure the smoothest transition possible."
In December 2019, Quicken software abruptly disabled bill-pay services through its Quicken Billpay affiliate, leaving all Quicken users without a fundamental feature of the software. Inquiries of the company were provided a form response that the disabling was a "known issue" and "This issue has been escalated to our Product Teams who are currently investigating the root cause of this behavior. At this time there isn't an ETA available." Quicken bill-paying continues to be inoperative as of December 27, 2019[update].
Quicken was originally written for MS-DOS and the Apple II back in 1983 and first released in 1984. The substantial differences between the Mac and these two platforms meant the later Macintosh version was written from the ground up. This led to incompatibilities between the file formats for the earlier versions and the Macintosh version. The Windows version was designed to be compatible with the earlier DOS version's files.
Then when Mac OS X came out in 1999 (server) and 2001 (desktop), a new platform emerged. Apple developed backward compatibility for OS 9 (and predecessors), so Quicken for Mac development continued in an older platform database structure (PowerPC-based). Apple continued to support PowerPC-based apps (via Rosetta) on their Intel-based Macs in August 2009 (via Mac OS X 10.6). Rosetta was a temporary measure to support the eventual transition to exclusively Intel-based software (achieved in March 2011 with the release of OS X 10.7 (Lion)).
In 2009, faced with the eventual retirement of the PowerPC, it was deemed that the structure for Quicken for Mac (2007) was not suited for the direction of the Mac (intel) and OS X. Though they got Quicken for Mac 2007 to run on Intel in 2012, Intuit decided to start from scratch and Quicken Essentials for Mac (QEM) was created in 2010. Quicken 2015 for Mac, released in August 2014, and later versions for Mac are built on the Quicken Essentials for Mac foundation. These newer versions of Quicken for Mac use an SQLite database.