I believe it really depends on your userbase. I just released Hakka News, a client for HN and I would never consider putting ads in an app gear towards this crowd.
In fact, I believe people on HN are more likely to just buy the app so I didn't bother with freemium or in-app purchase. HN people mostly understand how much effort it takes to develop quality software and they're not poor either.
Now, for something like a reddit client, I would still expect them to be intolerant of ads, so in-app purchase would probably work better here. Reddit userbase, I expect, are less likely to purchase the app.
Then, there are apps geared towards the common people, a much much bigger crowd. Mctube is good example. They used to free with iap, no ads in both version.
Then afterward, the dev switched to free completely and with ads. I suspect they're maybe a lot more money with the latter.
In fact, I believe people on HN are more likely to just buy the app so I didn't bother with freemium or in-app purchase. HN people mostly understand how much effort it takes to develop quality software and they're not poor either.
Now, for something like a reddit client, I would still expect them to be intolerant of ads, so in-app purchase would probably work better here. Reddit userbase, I expect, are less likely to purchase the app.
Then, there are apps geared towards the common people, a much much bigger crowd. Mctube is good example. They used to free with iap, no ads in both version. Then afterward, the dev switched to free completely and with ads. I suspect they're maybe a lot more money with the latter.