Introduction to Mobile App Development

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Introduction to MOBILE APP Development 1 — © Rob Stearn, 2016

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Rob Stearn MOBILE APP DEVELOPER NOTONTHEHIGHSTREET 2 — © Rob Stearn, 2016

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"Can I develop an app?" "Do I need coding experience?" 3 — © Rob Stearn, 2016

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YES & YES 4 — © Rob Stearn, 2016

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"IT'S COMPLICATED..." 5 — © Rob Stearn, 2016

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WHAT DO WE MEAN BY APP? ▸ A program that does one thing and does it as well as possible. ▸ Something a person interacts with. ▸ Something other software interacts with. ▸ Installs on a mobile device 6 — © Rob Stearn, 2016

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WHAT DO WE MEAN BY DEVELOP? 7 — © Rob Stearn, 2016

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"You've got to start with the customer experience and work back toward the technology - not the other way around." Steve Jobs 8 — © Rob Stearn, 2016

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"Can I use my skills to play a part in the development of an app?" 9 — © Rob Stearn, 2016

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"Can I use my skills to play a part in the development of an app?" ▸ Design it. ▸ Build it. ▸ Test it. ▸ Release it. ▸ Measure it. 10 — © Rob Stearn, 2016

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▶︎ DESIGN IT. 11 — © Rob Stearn, 2016

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DESIGN: RESPECT THE PLATFORM 12 — © Rob Stearn, 2016

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DESIGN GUIDELINES ▸ Apple Human Interface Guidelines. ▸ Android Material Design Guide. ▸ Microsoft Mobile Design Guide. 13 — © Rob Stearn, 2016

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Example: CINEMA CLUB 14 — © Rob Stearn, 2016

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DESIGN: USER STORIES 18 — © Rob Stearn, 2016

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WHAT ✔ HOW ✘ 19 — © Rob Stearn, 2016

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DESIGN: REQUIREMENTS 20 — © Rob Stearn, 2016

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WHAT ✔ HOW ✔ 21 — © Rob Stearn, 2016

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DESIGN: DATA 22 — © Rob Stearn, 2016

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DATA > INCOMING ▸ User Input ▸ Hardware Sensors ▸ OS & Apps on device ▸ Data feeds 23 — © Rob Stearn, 2016

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DATA > OUTGOING ▸ External APIs & Servers ▸ Social Media ▸ Display ▸ OS & Apps on device 24 — © Rob Stearn, 2016

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PROTOTYPING STATIC & dynamic 25 — © Rob Stearn, 2016

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POP PROTOTYPING ON PAPER 26 — © Rob Stearn, 2016

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BUILD habits WITH YOUR USERS 27 — © Rob Stearn, 2016

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DESIGN > BUILD HABITS ▸ Update content regularly ▸ Communicate that change: notifications, email ▸ Incentivise usage: recognition vs reward ▸ Build community ▸ Give value: value creates desire 28 — © Rob Stearn, 2016

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Psychology is more powerful than common sense 29 — © Rob Stearn, 2016

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STORY 30 — © Rob Stearn, 2016

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DESIGN ▸ Respect the platform you're on ▸ Write user stories & requirements ▸ Consider data flow ▸ Test with prototypes ▸ Build habits with your users 31 — © Rob Stearn, 2016

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▶︎ BUILD IT. 32 — © Rob Stearn, 2016

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BUILD > LANGUAGES ▸ iOS: Objective-C, Swift*, C, C++ ▸ Android: Java, Kotlin, Go*, C++, C ▸ Windows Mobile: C#, C++, C, HTML/CSS/JS 33 — © Rob Stearn, 2016

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BUILD > TOOLS 34 — © Rob Stearn, 2016

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THERE'S NEVER BEEN A BETTER TIME TO learn to code. 35 — © Rob Stearn, 2016

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BUILD > LEARNING self guided learning ▸ Online Tutorials: Ray Wenderlich, Big Nerd Ranch, Lynda.com ▸ Resources: Stack Overflow, Forums, Developer Documentation ▸ Community: Meetups, hackathons, Conferences ▸ Books: O'Reilly, Sybex, Wiley etc... 36 — © Rob Stearn, 2016

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BUILD > LEARNING Guided learning ▸ Online Courses: Coursera, iTunes U, Codeacademy ▸ Institutions: General Assembly, Birkbeck, UoW 37 — © Rob Stearn, 2016

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BE BETTER THAN YOU WERE YESTERDAY 38 — © Rob Stearn, 2016

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STORY 39 — © Rob Stearn, 2016

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BASIC > DESIGN > AEROSPACE > RETAIL > SYSADMIN > WEB > SUPPORT > RETAIL > IOS DEV 41 — © Rob Stearn, 2016

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BUILD > HIRING Hiring is hard 42 — © Rob Stearn, 2016

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BUILD > HIRING ▸ Personal Experience ▸ Personal Recommendation ▸ Developer Community ▸ Online Contributions - Github, Stack Overflow ▸ Recruiters 43 — © Rob Stearn, 2016

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BUILD > HIRING ▸ Experience vs Flexibility ▸ Broad vs Deep ▸ Remote vs Local ▸ Contract vs Permanent 44 — © Rob Stearn, 2016

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WORKFLOW ! ▶︎ ✏ ▶︎ # ▶︎ $ ▶︎ ☁ 45 — © Rob Stearn, 2016

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STORY 46 — © Rob Stearn, 2016

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BUILD > WORKFLOW ▸ Set a coding standard ▸ Insist on Unit Tests* ▸ Deﬁne what 'Done' means ▸ Select a planning tool ▸ Embrace a version control system 47 — © Rob Stearn, 2016

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BUILD > WORKFLOW A FEW WORDS ON TECHNICAL DEBT 48 — © Rob Stearn, 2016

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TECHNICAL DEBT WILL ALWAYS EXIST IT'S ONLY A PROBLEM IF YOU DON'T HAVE A REPAYMENT PLAN 49 — © Rob Stearn, 2016

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LOCALISED & ACCESSIBLE 50 — © Rob Stearn, 2016

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BUILD ▸ Learn you can build it yourself ▸ Hire flexibility & fit over cheap & flashy ▸ Implement coding standards & processes ▸ Plan for technical debt ▸ Ensure code is localised and accessible 51 — © Rob Stearn, 2016

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▶︎ TEST IT. 52 — © Rob Stearn, 2016

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TEST > WHAT SHOULD YOUR APP DO? UNIT TESTS TEST EACH FUNCTION IN THE CODE WRITE THE TESTS BEFORE THE CODE 53 — © Rob Stearn, 2016

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TEST > WHAT SHOULD YOUR APP DO? INTEGRATION TEST THE FLOW THROUGH THE CODE SCRIPTING THE USER STORIES 54 — © Rob Stearn, 2016

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TEST > WHAT DOES YOUR APP DO? ANALYTICS ADD LIVE MEASUREMENT TO THE CODE REQUIRES CAREFUL PLANNING 56 — © Rob Stearn, 2016

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TEST > WHAT DOES YOUR APP DO? BETA TESTING TEST WITH REAL HUMANS ON REAL TASKS TRY FORMAL AND INFORMAL SESSIONS 57 — © Rob Stearn, 2016

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TEST ▸ use unit tests to assess code quality ▸ begin with the test and work toward the code ▸ follow the path of execution with integration ▸ consider what to measure and what not to ▸ value the feedback from users most of all 58 — © Rob Stearn, 2016

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▶︎ RELEASE IT. 59 — © Rob Stearn, 2016

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BUILD relationships 60 — © Rob Stearn, 2016

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RELEASE > BUILD RELATIONSHIPS ENGAGE WITH THE GATEKEEPERS ▸ Communicate ▸ Attend events ▸ Study the press 61 — © Rob Stearn, 2016

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REVENUE MODELS ▸ DOWNLOAD - FREE - PAID ▸ IN-APP PURCHASE - NONE - CONSUMABLE - NON-CONSUMABLE - SUBS ▸ PASSIVE IN-APP - NONE - AD-SUPPORTED - AFFILIATES ▸ EXTERNAL PURCHASE - NONE - SALES - COMMISSION 67 — © Rob Stearn, 2016

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RELEASE ▸ Cultivate relationships ▸ Publicise the process and the result ▸ Create anticipation and desire ▸ Assess your revenue model 70 — © Rob Stearn, 2016

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MEASURE > 'TEMPERATURE' ▸ Twitter/Facebook/Other statistics ▸ Site visits ▸ Communication from users 72 — © Rob Stearn, 2016

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MEASURE > THE RETURN OF ANALYTICS INTEGRATING INFORMATION @ NOTHS ▸ App Reviews display in Slack ▸ HockeyApp creates tickets for bugs in Pivotal Tracker ▸ Git commits contain ticket refs from Pivotal Tracker ▸ HockeyApp sends daily digests of crash reports via Email ▸ Xcode Server reports results of Integration tests in Slack 76 — © Rob Stearn, 2016

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MEASURE > THE RETURN OF ANALYTICS > ETHICS TAKING RESPONSIBILITY FOR DATA If you decided to use a free analytics library: ▸ what are their privacy policies? ▸ Are your users paying with their data and yours? ▸ Are you ensuring that peoples data is anonymous? ▸ Are you asking for their permission and acting on their answer? 78 — © Rob Stearn, 2016

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MEASURE ▸ Don't rue every user who opts out as missed data. ▸ Make it point of pride that you respect peoples privacy. ▸ Respect anonymity requests. ▸ Be transparent about data usage and dependencies. ▸ Fulﬁl your obligations. ▸ Remember statistics can be manipulated 80 — © Rob Stearn, 2016