Table 2.

Key themes identified for important features for a smoking cessation app.

Themes	Subthemes	Quotes
Health information	To know the harms of smoking and the benefits of quitting	I think what you need to hear is that stern image you have on the back of cigarettes of what it is doing to you. Maybe it could give you an explanation of how your health is improving.
Distraction from craving	To keep your hands busy; To help you know what to do when you get cravings; To have a craving button	I am craving so idea of a craving button which could be pressed when needed and links to a page with different management strategies e.g. play game, prompt to go for walk, speak to friend.
Personalization or related to real time quitting	To be personalized to the individual; To receive personalized texts and messages at times of craving; To be able to enter personalized quit date and plan; To be able to record relapses	Being personalized is definitely important. Maybe you could put dates in for your stop date. If you had a relapses you could put it in there too, so it is tied to your real time quitting. You could have it so when you wake up it says good morning this is your 11th day, that would be motivating, that would make me stop smoking. Maybe you could set it so it gave you little motivations reminders at times that you need them.
Bright in color	To be bright in color	Being colorful is important.
Interactive	To be interactive	It has to be interactive to work.
Gamification	To contain gaming elements; To be fun	Having a game and having to do something with your hands does work because you will spend an hour on that game before you have realized it and that an hour you have not smoked a cigarette. Games are very good, candy crush is brilliant, I was playing it at 3am when I wanted a cigarette, doing something quick with your hands takes your mind off it.
Diary	To contain a personal dairy	Like for example I want to do something in my diary, like today I have stopped and I really fell like a cigarette, so I would write down I have saved x amount by not going out and buying cigarettes.
Financial saving	To contain information on the financial savings of quitting	I would like to know I have saved x amount by not going out and buying cigarettes After a week if would be good to tot up how much money you have saved.
Links to local services, pharmacies	Links to local quit smoking services or phone lines or local pharmacies	That would really help, or it could give locations of stop smoking places.
Information about NRTa	To contain information about different NRT products available and how to use them	I would like to know more about the different products available.
Emotional content	To have an emotional content, would prefer focus on positive not negative emotions; To promote feelings of relaxation and happiness	It needs to have an emotional content, but I think more focus on the positive rather than the negative. I want it to help me relax.

^aNRT: nicotine replacement therapy.