Rewarded Video vs Interstitial Ads: Which Should You Use?

Two very different earners

Rewarded video and interstitials drive most mobile game ad revenue, but they treat your players in opposite ways. One is invited; the other interrupts. Get the balance right and you have healthy, durable revenue. Get it wrong — usually by over-serving interstitials — and you trade a short-term revenue bump for a retention problem that quietly shrinks the audience generating every future impression.

This guide covers what each format is, what it pays, what it costs you in player goodwill, and how to combine them. The short version: lead with rewarded video, layer in interstitials at genuine breaks, and cap everything.

Rewarded video

Players opt in to watch a full video (usually 15–30 seconds) in exchange for something they want: coins, an extra life, a revive, a 2× reward, a skip. Because it is voluntary, it rarely annoys anyone, and it carries the highest eCPM of any mobile format — roughly $2.50 in low-tier geographies up to the high-$20s for a Tier-1 audience. Advertisers pay a premium because the viewer chose to watch and is paying attention, which is exactly the engagement performance campaigns are hunting for.

The counterintuitive part: rewarded video can improve retention. A player stuck on a hard level who watches an ad for a continue is a player who did not rage-quit and uninstall. You are selling progress, and the ad is the price. Handled well, it is revenue with no retention cost — the only format where that is true.

• Best for: currency top-ups, continues/revives, doubling end-of-level rewards, unlocking a skip, free daily spins.
• Watch out for: limited inventory. There are only so many natural “I want a reward right now” moments, so rewarded impressions per user are capped by your game design, not by how often you are willing to show ads.

Interstitials

Full-screen ads shown at a break in play, dismissible after a few seconds. They pay well — roughly $1.10 to $13 eCPM depending on geography — and they are trivial to implement: no reward economy to design, just a call at the right moment. The catch is right there in the name of the risk: they interrupt, and over-serving them is the single fastest way to tank retention in a casual game.

• Best for: clean transitions where the player has mentally “finished” something — level complete, game over, returning to the menu, between rounds.
• Watch out for: frequency and timing. Cap to roughly one every 2–4 minutes, never fire mid-action, and never stack one immediately after a rewarded ad. An interstitial that appears while the player is mid-swipe reads as a bug, not an ad.

The other two: banners and native

Banners earn very little — often well under a dollar eCPM — but they are persistent and unobtrusive, so their job is to fill dead space on static screens (a menu, a settings page, a leaderboard) without getting in the way. Native ads, styled to match your UI, sit in between: better eCPM than a banner, less disruptive than an interstitial, but they require design work to look intentional rather than sneaky. In a game, both are supporting acts, not headliners.

Head to head

Which should you use? Almost always, both

For the vast majority of games the answer is not to pick one but to layer them by disruption:

1. Lead with rewarded video wherever a player wants a boost. It is your highest-eCPM format and it costs you nothing in goodwill, so there is no reason to under-use it.
2. Layer in interstitials at natural breaks, with strict frequency caps and a first-session grace period so brand-new players are not hit with an ad before they are hooked.
3. Add banners only on static screens, where their tiny eCPM stays quietly out of the way.

The retention math nobody runs

Here is why over-serving interstitials backfires. Suppose adding a second interstitial per session lifts today’s ad revenue 15%. If that extra interruption drops your day-7 retention from 20% to 17%, you have roughly 15% fewer players a week from now — and fewer players means fewer sessions, fewer impressions, and less revenue on every day after that. The 15% you gained today compounds against you for the life of the cohort. Revenue is impressions × eCPM, and interstitial abuse quietly destroys the impressions half of that equation. Rewarded video does not carry this tax, which is why it should always be your first lever. The increase-ad-revenue guide goes deeper on protecting sessions.

A quick rule of thumb

If a placement interrupts the player, it must sit at a genuine pause and it must be capped. If a placement rewards the player, it can appear far more often, because they asked for it. Design your ad plan around that one distinction and you will avoid the mistake that sinks most first-time monetizers. Get the eCPM context first with our plain-English eCPM guide, then model your own format mix.

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