Since subscription apps first started to gain in popularity, free trials have been a foundation for most user acquisition (UA) marketers, serving as the main proxy event to attract real long-term subscribers. But this tactic, like so many other elements of our industry, has been changed by AI and vibe-coding. It’s now harder than ever to run campaigns optimizing towards a free trial, largely due to the enormous competition and overall declining trial conversion rates.
As the State of Subscription Apps 2026 shows, there’s a growing trend of trials shortening to three days — despite data encouraging the opposite; showing that trials with 17+ days convert 70% better (42.5% paid conversion rate vs. 25.5%).
Even with this huge discrepancy, nearly half of all apps now use trials of four days or less, seeking immediate revenue and shorter payback periods that make publishers’ margins more affordable from the UA perspective.
This is not a coincidence. AI has drastically changed the whole market: by adding variable and rising costs to the use of its technology, AI has forced publishers and developers to look for higher average revenue per user (ARPU) in the shortest time possible, in order to can’t cover these costs and sustain the business. Otherwise, the apps become unmarketable themselves, making the product-market fit (PMF) process harder than ever.
If you also consider the popularity of how web-to-app campaigns can help you to nail signal engineering, we can easily draw the conclusion that free trials don’t make much sense anymore. But is that a fair blanket statement? I think it’s true, but that doesn’t mean free trials are over. We can still play with a more advanced version of this conversion event.
Before exploring what that looks like, let’s dive into the reasons why free trials became so popular on subscription apps.
Free trials: the purchase proxy event
The title speaks for itself: The free trial event has been the foundation of endless companies’ UA strategies for a simple reason — a free trial is the closest event to purchase. What’s more, the event can filter purchase intention, without sacrificing the volume that ad networks need to optimize performance efficiently.
When AI didn’t exist and the offer of apps was more limited, free trials were widely used as a technique to convince the user to convert, with publishers heavily relying on their products and UX to make the conversion effective. But that doesn’t apply anymore. Today, hard paywalls with direct subscriptions are becoming more present, with data showing they generate close to double the upfront revenue vs. freemium apps.
This growing shift away from free trials is clearly visible when you compare 2026’s report vs. 2024. We can see how all categories have seen a 14% increase in the non-trial strategies (28% in 2024 in non-trial strategies vs. 32% in 2026) where free trials are non-existent.
