--- title: Simon Lee | We Are Affective description: Founder of We Are Affective. Simon writes on app strategy, UX psychology, and why most products fail before a line of code is written. --- [Skip to content](https://weareaffective.com/learning-centre/author/simon-lee#main-content) [![we\_are\_affective\_logo\_200](https://weareaffective.com/hs-fs/hubfs/we_are_affective_logo_200.png?width=175&height=48&name=we_are_affective_logo_200.png "we_are_affective_logo_200")](https://weareaffective.com) - [Home](https://weareaffective.com) - About Us - [Our Story](https://weareaffective.com/about) - [How We Work](https://weareaffective.com/how-we-work) - Our Services - [App Planning & Strategy](https://weareaffective.com/app-planning-strategy) - [App Design](https://weareaffective.com/app-design-agency) - [App UX Design](https://weareaffective.com/app-ux-design) - [App UI Design](https://weareaffective.com/app-ui-design) - [App Technical Architecture](https://weareaffective.com/app-architecture) - [Existing App Audits](https://weareaffective.com/app-audit) - [Case Studies](https://weareaffective.com/case-studies) - [Pricing](https://weareaffective.com/pricing) - [Learning Centre](https://weareaffective.com/learning-centre) - [Get Started](https://weareaffective.com/get-started) [← Back to Questions](https://weareaffective.com/learning-centre) # All guides by Simon Lee [![Which Ongoing Costs Should You Budget for After Your App Launches](https://weareaffective.com/hubfs/learning-centre-images/which-ongoing-costs-should-you-budget-for-after-your-app-launches.webp) Expert Guide Which Ongoing Costs Should You Budget for After Your App Launches →](https://weareaffective.com/learning-centre/which-ongoing-costs-should-you-budget-for-after-your-app-launches) [![What the First 30 to 90 Days of a Lifestyle App Actually Decide About Retention](https://weareaffective.com/hubfs/learning-centre-images/what-the-first-30-to-90-days-of-a-lifestyle-app-actually-decide-about-retention.webp) Expert Guide What the First 30 to 90 Days of a Lifestyle App Actually Decide About Retention →](https://weareaffective.com/learning-centre/what-the-first-30-to-90-days-of-a-lifestyle-app-actually-decide-about-retention) [![What Happens if My App Breaks International Privacy Laws](https://weareaffective.com/hubfs/learning-centre-images/what-happens-if-my-app-breaks-international-privacy-laws.webp) Expert Guide What Happens if My App Breaks International Privacy Laws →](https://weareaffective.com/learning-centre/what-happens-if-my-app-breaks-international-privacy-laws) [![What Type of Content Should I Create to Promote My Mobile App](https://weareaffective.com/hubfs/learning-centre-images/what-type-of-content-should-i-create-to-promote-my-mobile-app.webp) Expert Guide What Type of Content Should I Create to Promote My Mobile App →](https://weareaffective.com/learning-centre/what-type-of-content-should-i-create-to-promote-my-mobile-app) [![What Legal Considerations Should Startups Know Before Launching an App](https://weareaffective.com/hubfs/learning-centre-images/what-legal-considerations-should-startups-know-before-launching-an-app.webp) Expert Guide What Legal Considerations Should Startups Know Before Launching an App →](https://weareaffective.com/learning-centre/what-legal-considerations-should-startups-know-before-launching-an-app) [![What's the Difference Between Terms of Service and Privacy Policy?](https://weareaffective.com/hubfs/learning-centre-images/whats-the-difference-between-terms-of-service-and-privacy-policy.webp) Expert Guide What's the Difference Between Terms of Service and Privacy Policy? →](https://weareaffective.com/learning-centre/whats-the-difference-between-terms-of-service-and-privacy-policy) [![Should I Pay Influencers Upfront or Offer Revenue Sharing for App Promotion](https://weareaffective.com/hubfs/learning-centre-images/should-i-pay-influencers-upfront-or-offer-revenue-sharing-for-app-promotion.webp) Expert Guide Should I Pay Influencers Upfront or Offer Revenue Sharing for App Promotion →](https://weareaffective.com/learning-centre/should-i-pay-influencers-upfront-or-offer-revenue-sharing-for-app-promotion) [![Which Social Media Platforms Are Best for Promoting My App?](https://weareaffective.com/hubfs/learning-centre-images/which-social-media-platforms-are-best-for-promoting-my-app.webp) Expert Guide Which Social Media Platforms Are Best for Promoting My App? →](https://weareaffective.com/learning-centre/which-social-media-platforms-are-best-for-promoting-my-app) [![What's Causing My App to Crash and How Do I Prevent It?](https://weareaffective.com/hubfs/learning-centre-images/whats-causing-my-app-to-crash-and-how-do-i-prevent-it.webp) Expert Guide What's Causing My App to Crash and How Do I Prevent It? →](https://weareaffective.com/learning-centre/whats-causing-my-app-to-crash-and-how-do-i-prevent-it) [![What Happens if I Need to Roll Back to an Old Version of My App?](https://weareaffective.com/hubfs/learning-centre-images/what-happens-if-i-need-to-roll-back-to-an-old-version-of-my-app.webp) Expert Guide What Happens if I Need to Roll Back to an Old Version of My App? →](https://weareaffective.com/learning-centre/what-happens-if-i-need-to-roll-back-to-an-old-version-of-my-app) [![When Does Your App Need Location Tracking Permission?](https://weareaffective.com/hubfs/learning-centre-images/when-does-your-app-need-location-tracking-permission.webp) Expert Guide When Does Your App Need Location Tracking Permission? →](https://weareaffective.com/learning-centre/when-does-your-app-need-location-tracking-permission) [![What Is an API and Why Does My Mobile App Need One?](https://weareaffective.com/hubfs/learning-centre-images/what-is-an-api-and-why-does-my-mobile-app-need-one.webp) Expert Guide What Is an API and Why Does My Mobile App Need One? →](https://weareaffective.com/learning-centre/what-is-an-api-and-why-does-my-mobile-app-need-one) [![What Legal Requirements Must My App Meet to Launch in Europe?](https://weareaffective.com/hubfs/learning-centre-images/what-legal-requirements-must-my-app-meet-to-launch-in-europe.webp) Expert Guide What Legal Requirements Must My App Meet to Launch in Europe? →](https://weareaffective.com/learning-centre/what-legal-requirements-must-my-app-meet-to-launch-in-europe) [![What Privacy Rules Apply to Location Data Collection?](https://weareaffective.com/hubfs/learning-centre-images/what-privacy-rules-apply-to-location-data-collection.webp) Expert Guide What Privacy Rules Apply to Location Data Collection? →](https://weareaffective.com/learning-centre/what-privacy-rules-apply-to-location-data-collection) [![Why Is My App Running Slowly and How Do I Fix It?](https://weareaffective.com/hubfs/learning-centre-images/why-is-my-app-running-slowly-and-how-do-i-fix-it.webp) Expert Guide Why Is My App Running Slowly and How Do I Fix It? →](https://weareaffective.com/learning-centre/why-is-my-app-running-slowly-and-how-do-i-fix-it) [![How Do I Fix an App That's Using Too Much Battery?](https://weareaffective.com/hubfs/learning-centre-images/how-do-i-fix-an-app-thats-using-too-much-battery.webp) Expert Guide How Do I Fix an App That's Using Too Much Battery? →](https://weareaffective.com/learning-centre/how-do-i-fix-an-app-thats-using-too-much-battery) [![What Happens if I Don't Update My App Regularly?](https://weareaffective.com/hubfs/learning-centre-images/what-happens-if-i-dont-update-my-app-regularly.webp) Expert Guide What Happens if I Don't Update My App Regularly? →](https://weareaffective.com/learning-centre/what-happens-if-i-dont-update-my-app-regularly) [![Which Phones Support AR Apps and Which Don't](https://weareaffective.com/hubfs/learning-centre-images/which-phones-support-ar-apps-and-which-dont.webp) Expert Guide Which Phones Support AR Apps and Which Don't →](https://weareaffective.com/learning-centre/which-phones-support-ar-apps-and-which-dont) [![How Do I Prepare My Apps Privacy Policy for Stores](https://weareaffective.com/hubfs/learning-centre-images/how-do-i-prepare-my-apps-privacy-policy-for-stores.webp) Expert Guide How Do I Prepare My Apps Privacy Policy for Stores →](https://weareaffective.com/learning-centre/how-do-i-prepare-my-apps-privacy-policy-for-stores) [![10 Brilliant App Referral Programs You Should Copy Legally](https://weareaffective.com/hubfs/learning-centre-images/10-brilliant-app-referral-programs-you-should-copy-legally.webp) Expert Guide 10 Brilliant App Referral Programs You Should Copy Legally →](https://weareaffective.com/learning-centre/10-brilliant-app-referral-programs-you-should-copy-legally) [![Where Can I Find Investors for My App Idea?](https://weareaffective.com/hubfs/learning-centre-images/where-can-i-find-investors-for-my-app-idea.webp) Expert Guide Where Can I Find Investors for My App Idea? →](https://weareaffective.com/learning-centre/where-can-i-find-investors-for-my-app-idea) [![How Long Does It Take to See Results From a Mobile App?](https://weareaffective.com/hubfs/learning-centre-images/how-long-does-it-take-to-see-results-from-a-mobile-app.webp) Expert Guide How Long Does It Take to See Results From a Mobile App? →](https://weareaffective.com/learning-centre/how-long-does-it-take-to-see-results-from-a-mobile-app) [![What Should I Do if My App Keeps Crashing on Certain Devices](https://weareaffective.com/hubfs/learning-centre-images/what-should-i-do-if-my-app-keeps-crashing-on-certain-devices.webp) Expert Guide What Should I Do if My App Keeps Crashing on Certain Devices →](https://weareaffective.com/learning-centre/what-should-i-do-if-my-app-keeps-crashing-on-certain-devices) [![Mobile Phone App Development Current Technologies and Future Trends](https://weareaffective.com/hubfs/learning-centre-images/mobile-phone-app-development-current-technologies-and-future-trends.webp) Expert Guide Mobile Phone App Development Current Technologies and Future Trends →](https://weareaffective.com/learning-centre/mobile-phone-app-development-current-technologies-and-future-trends) [![iOS App Development](https://weareaffective.com/hubfs/learning-centre-images/ios-app-development.webp) Expert Guide iOS App Development →](https://weareaffective.com/learning-centre/ios-app-development) [![What's the Difference Between a PWA and a Responsive Website?](https://weareaffective.com/hubfs/learning-centre-images/whats-the-difference-between-a-pwa-and-a-responsive-website.webp) Expert Guide What's the Difference Between a PWA and a Responsive Website? →](https://weareaffective.com/learning-centre/whats-the-difference-between-a-pwa-and-a-responsive-website) [![The Neuroscience of App Addiction Designing for Healthy Engagement](https://weareaffective.com/hubfs/learning-centre-images/the-neuroscience-of-app-addiction-designing-for-healthy-engagement.webp) Expert Guide The Neuroscience of App Addiction Designing for Healthy Engagement →](https://weareaffective.com/learning-centre/the-neuroscience-of-app-addiction-designing-for-healthy-engagement) [![Dopamine Driven Design Creating Apps Users Can't Delete](https://weareaffective.com/hubfs/learning-centre-images/dopamine-driven-design-creating-apps-users-cant-delete.webp) Expert Guide Dopamine Driven Design Creating Apps Users Can't Delete →](https://weareaffective.com/learning-centre/dopamine-driven-design-creating-apps-users-cant-delete) [![Dark Mode Done Right a Step by Step Guide for App Developers](https://weareaffective.com/hubfs/learning-centre-images/dark-mode-done-right-a-step-by-step-guide-for-app-developers.webp) Expert Guide Dark Mode Done Right a Step by Step Guide for App Developers →](https://weareaffective.com/learning-centre/dark-mode-done-right-a-step-by-step-guide-for-app-developers) [![What Makes Your Mobile App Valuable to Potential Buyers](https://weareaffective.com/hubfs/learning-centre-images/what-makes-your-mobile-app-valuable-to-potential-buyers.webp) Expert Guide What Makes Your Mobile App Valuable to Potential Buyers →](https://weareaffective.com/learning-centre/what-makes-your-mobile-app-valuable-to-potential-buyers) Load More Guides ### Stop guessing. 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[Get Started](https://weareaffective.com/get-started) [![We Are Affective](https://weareaffective.com/hubfs/we_are_affective_logo_mark.svg)](https://weareaffective.com) 20-22 Wenlock Road London, N1 7GU United Kingdom +44 20 4572 8062 [hello@weareaffective.com](mailto:hello@weareaffective.com) Services [App planning & strategy](https://weareaffective.com/app-planning-strategy) [App design](https://weareaffective.com/app-design-agency) [App UX design](https://weareaffective.com/app-ux-design) [App UI design](https://weareaffective.com/app-ui-design) [App technical architecture](https://weareaffective.com/app-architecture) [Existing app audits](https://weareaffective.com/app-audit) Legal [Privacy policy](https://app.termly.io/policy-viewer/policy.html?policyUUID=b8fa9921-7518-4fb5-8ddd-9dc7f5977ed2) [Terms](https://app.termly.io/policy-viewer/policy.html?policyUUID=8b6a6ad5-91bd-4176-a5f7-6d36b0398f70) Case studies [TravAI](https://weareaffective.com/case-studies/travai) [Meditech](https://weareaffective.com/case-studies/harley) [WorkingWeight](https://weareaffective.com/case-studies/workingweight) [SkinSync](https://weareaffective.com/case-studies/skinsync) [Three Lochs](https://weareaffective.com/case-studies/three-lochs) [Drift](https://weareaffective.com/case-studies/drift) About us [Our Story](https://weareaffective.com/about) [How We Work](https://weareaffective.com/how-we-work) Guides [Creating an app](https://weareaffective.com/how-to-create-an-app) [Building an MVP](https://weareaffective.com/building-an-mvp) [Cost and budgeting](https://weareaffective.com/app-development-cost) [App technology](https://weareaffective.com/app-development) [Planning and strategy](https://weareaffective.com/app-planning-strategy) [User research](https://weareaffective.com/app-user-research) [Onboarding design](https://weareaffective.com/app-onboarding-design) [User psychology](https://weareaffective.com/user-psychology-app-design) [Launch and growth](https://weareaffective.com/app-launch-growth) Copyright © 2026, weareaffective.com. 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