add-on
Bolt-on bonus feature
An add-on is something attached or added to enhance a main product or service.
Software add-ons extend a program's functionality: browser add-ons, game add-ons.
The term applies to optional extras generally—airline add-ons like seat upgrades, or add-on purchases at checkout.
As an adjective: add-on features, add-on costs.
Modular software extension
- extensionAdded part or duration
- moduleIndependent functional component
- widgetUnspecified small device
- appletMiniature embedded program
patch · toolbar · script · utility · package · library · framework · driver
Additional, beyond necessary
- upgradeRaise to higher standard
- optionalNot mandatory
- upsellPromote add-ons or upgrades
- premiumAdded cost for better
deluxe · bundle · package · tier · subscription · in-app purchase · DLC · expansion pack
Artificial head covering
Employment bonus
- benefitAdvantage or gain
- incentiveReward encouraging action
- freebieItem given gratis
- sweetenerAdditive reducing bitterness
extra · complimentary · throw-in · gift · premium · promotional · giveaway
plugin
Modular software extension
applet · patch · toolbar · script · utility · package · library · framework · driver · API
extra
Additional, beyond necessary
premium · deluxe · bundle · package · tier · subscription · in-app purchase · DLC · expansion pack · surcharge
wig
Artificial head covering
perk
Employment bonus
sweetener · extra · complimentary · throw-in · gift · premium · promotional · giveaway
attachment
Connection or fondness
part · module · device · adapter · peripheral · mount · bracket · connector · kit · hardware
vitamin
Essential organic nutrient
- mineralNaturally formed crystalline solid
- probioticHealthful live microorganism supplement
- omega-3Polyunsaturated dietary fat
protein · fiber · calcium · magnesium · zinc · iron · herbal · nutraceutical · dietary · nutritional
- add-onsextras, upgrade, upgrades, expansion pack, expansions
- extensionsappendix, appendage, annex, supplement, continuation
- pokerblinds, all-in, all in, call, seven-card stud
- softwaresoftware, app, apps, application, program
- customizationcustomize, customizing, personalize, personalizing, custom
- fast foodMcDonald's, Burger King, Wendy's, Taco Bell, KFC
add-onessential
Fundamentally necessary
necessity · requirement · requisite · must-have · fundamental
add-onbuilt-in
Included as standard
included · out-of-the-box · default · stock · bundled
add-oncore
Central essential portion
base model · base · foundation · nucleus · backbone