Set Trial Length Before Pricing: 30 Annual, 10-16 Monthly, 16 AI

Set the annual trial at the long end

Before you ship pricing, set the trial length. Start with the plan that carries the most risk for you and the user.

RevenueCat, a subscription-management company, tracked more than 17,000 mobile subscription apps from August 2025 through July 2026, and the company handles subscription management for about 60% of mobile subscription apps. On annual plans, conversion climbed as trials got longer: 24 percent for four days or less, 33 percent for five to nine days, 43 percent for ten to sixteen days, and 44.6 percent for seventeen to thirty-two days. First renewal moved the same way, from 18.3 percent after the shortest trials to 47.5 percent after the longest.

Use the long end for the annual trial. When you have no distribution yet, the trial is part of the sales work. You are explaining the product while the user is still inside it. A longer annual trial gives you more time to do that work manually. You can call the user, walk them through the first task, and fix the onboarding before the trial ends. It also gives the user more time to see whether the product earns the commitment.

The trap is treating the long trial as a growth tactic. Treat it as a qualification period. The pricing page can default the annual plan to the longer trial before any card is required. The monthly option can still be visible, but it should not be the experiment you are trying to optimize.

Keep the monthly trial short

For monthly plans, the evidence points to a shorter trial. In the dataset, monthly conversion was 46.6 percent for ten-to-sixteen-day trials, while seventeen-to-thirty-two-day trials had 43.7 percent conversion and the highest first-renewal rate at 77.5 percent. Set the monthly trial inside that range. The renewal rate matters more than the conversion rate. A user who pays after a long monthly trial is more likely to stay, but you do not need the longest trial to get a paying user.

When you are still learning what the product should be, a short monthly trial keeps the feedback close. Talk to users before they leave. Ask why they hesitated at the paywall. Change the onboarding, the default plan, or the first task without waiting for a long trial to expire.

The monthly plan should expire after the trial. The page should make the annual plan the better deal, but it should not hide the monthly option. For early users, the monthly plan can lower the barrier to paying.

Cap the AI trial at the useful limit

If your product is AI, do not copy the annual rule. For AI apps on monthly plans, conversion fell from 38.5 percent for ten-to-sixteen-day trials to 31.8 percent for seventeen-to-thirty-two-day trials, while first renewal stayed nearly flat at 64.2 percent versus 64.1 percent. Cap the AI trial at the top of that range. The extra days do not buy better users. They buy more free usage.

AI products consume resources as users play. A long trial can become free inference, especially when the product is still rough. You need the trial to show the value of the model, the workflow, or the output. You do not need it to become unlimited prompts.

The trial should include a usage limit, a credit cap, or a feature boundary that makes the paid plan the next step. The limit should be visible before the trial starts. If the user has to guess what is included, the trial creates extra support work.

Test only the annual offer

After the page ships, run one focused experiment. The trial-length results are correlational; test a 14-day annual trial against a 30-day annual trial for one quarter while measuring conversion and 12-month renewal. Assign new annual signups to the two trial lengths, then decide using renewal, not just signup.

Annual is the plan where the difference is large enough to matter. Short annual trials shorten the decision, but they can also leave you with churn you will feel later. The longer annual trial gives you a cleaner read on whether the product can hold an annual commitment.

Do not test monthly, AI, onboarding, email, and pricing at the same time. Signups are too few for it. Pick the annual trial and let the renewal data decide.