Question: What is the app AppSumo known for?

Context paragraphs:
Deal of the day: Deal-of-the-day (also called daily deal or flash sales or one deal a day) is an ecommerce business model in which a website offers a single product for sale for a period of 24 to 36 hours.  Potential customers register as members of the deal-a-day websites and receive online offers and invitations by email or social networks.

AppSumo: AppSumo is a daily deals website for digitally distributed goods and online services.  AppSumo was founded in March 2010 by Noah Kagan.  Today the company has over 700,000 active subscribers.

Alarms &amp; Clock: Alarms & Clock (originally known as Clock & Alarms on Pocket PC 2000 and Alarms on Windows 8.1) is a time management application included with Windows and Windows 10 Mobile with four key features: alarms, world clocks, timers, and a stopwatch.  The features are listed on a wireframe ribbon menu.  The app is similar in functionality and design to the Clock app on iOS.  Alarms & Clock was available on mobile devices for over a decade before it was available on PCs with the introduction of Windows 8.1.  Tiles for alarms, timers, and the stopwatch can be pinned to the Start menu.  The latest version of the app uses the Universal Windows Platform APIs and uses the system's setting for light or dark theming.  Alarms & Clock is not integrated with the taskbar clock.

Thiruvananthapuram City Police Mobile App: Thiruvananthapuram City Police Mobile App , also known as TCP app, or UR Safe(TM) (previously known as iSafe)"," is the official mobile application for the citizens and public by the Thiruvananthapuram City Police in Kerala, India.  The mobile application is developed by UST Global, a global digital technology services company for end-to-end IT services and solutions for Global 1000 companies.  The ‘UR Safe’ feature of the app helps people, especially women, to send instant alerts to the police control room by using the "Panic Button" or by a long press of volume rocker (down) key of their mobile phones and police to arrive at the location.

PP Jailbreak: PP Jailbreak, also commonly known as PP, PP25 App or PP25 Jailbreak, is a term describing a free Chinese app containing tools capable of jailbreaking iOS 8 devices, except for Apple TV.  Eligible products include: iPod Touch, iPhone and iPad.  This app was developed by a Chinese iOS hacking community known as PP Assistant.  It was first released on January 19, 2015.

Kounta (software company): Kounta is an Australian software company founded in 2012.  The company is best known for its flagship product, Kounta, which comprises a cloud based point of sale mobile app.  Released in 2012, Kounta became the first hospitality-focused point of sale (POS) mobile app for iPad, Android, Mac, and Windows.  In 2012 Epson announced a partnership with Kounta, which led to the integration of Kounta's cloud-based POS platforms in Epson printers.  In 2013 Kounta launched a partnership with PayPal to integrate cashless and cardless transactions via PayPal's mobile app.  In June 2014, Kounta announced a minority stake investment from MYOB (company), which resulted in a partnership towards the development of a co-branded product integrating Kounta's POS with MYOB's software.  MYOB Kounta launched in October of the same year.  In 2016, Kounta partnered with The Commonwealth Bank of Australia to include the Kounta app onto "Albert", the bank's EFTPOS tablet.  This allowed The Commonwealth Bank of Australia to become the first bank to manage customers operations from a single mobile application.

Apteligent: Apteligent (previously known as Crittercism Inc.), based in San Francisco, California, is a mobile application intelligence solution providing both tools and app performance insights for mobile developers and product managers and mobile ecosystem performance data.  The Apteligent platform provides a real-time global view of app diagnostics and crashes across iOS, Android, Hybrid, and Unity apps and is used in more than 8 billion monthly app launches by 23 million apps including Pokémon Go - the most popular app ever released.  The company’s investors include Opus Capital, Shasta Ventures, and Scale.

Conference app: A conference app, also known as an event app or meeting app, is a mobile app developed to help attendees and meeting planners manage their conference experience.  It typically includes conference proceedings and venue information, allowing users to create personalized schedules and engage with other users.  A conference app can be a native app or web-based.  In recent years, conference apps have gained in popularity as a sustainable solution for event management by reducing paper produced by printed materials.

Find My iPhone: Find My iPhone (also known as Find iPhone on the SpringBoard, and also known specifically for other devices as Find My iPad, Find My iPod, or Find My Mac) is an app and service provided by Apple Inc. that allows remote location-tracking of iOS devices and Mac computers.  s of March 2013 , the service currently is available for iOS 5 or later and OS X 10.7.5 "Lion" or later through iCloud.  As of the release of iOS 9, the application (app) is now bundled with the operating system.  If a user is running iOS 8, the app is available for download from the App Store free of charge.

Alpha secretase: Alpha secretases are a family of proteolytic enzymes that cleave amyloid precursor protein (APP) in its transmembrane region.  Specifically, alpha secretases cleave within the fragment that gives rise to the Alzheimer's disease-associated peptide amyloid beta when APP is instead processed by beta secretase and gamma secretase.  The alpha-secretase pathway is the predominant APP processing pathway.  Thus, alpha-secretase cleavage precludes amyloid beta formation and is considered to be part of the non-amyloidogenic pathway in APP processing.  Alpha secretases are members of the ADAM ('a disintegrin and metalloprotease domain') family, which are expressed on the surfaces of cells and anchored in the cell membrane.  Several such proteins, notably ADAM10, have been identified as possessing alpha-secretase activity.  Upon cleavage by alpha secretases, APP releases its extracellular domain - a fragment known as APPsα - into the extracellular environment in a process known as "ectodomain shedding".

Supporting paragraphs: AppSumo Deal of the day
Answer: Deal-of-the-day