You will often hear that playables beat video on CPI. It depends: playables outperform video for users who would have installed anyway, because they self-select before tapping. But for audiences who need brand or product education before converting, video may still win. Once you know why the CPI differs, you can match each format to the right audience.
Why Playables Generate Lower CPI
The CPI advantage from playable ads comes from intent pre-qualification. A user who taps a CTA after 8 seconds of mini-game play has already demonstrated: they understand the game genre, they found the mechanic engaging enough to continue, and they voluntarily chose to tap install rather than swiping past. Each of those filters removes users who would have installed but churned on Day 1, or never have installed with real intent.
A lower CPI only helps if the installs are as good. If your playable delivers a 15% lower CPI but a 10% higher Day 7 retention rate, the true cost advantage is larger than the CPI number suggests. Track downstream quality metrics alongside raw install volume when evaluating playable performance.
The Engagement Signal Compounding Effect
Ad networks with ML bidding (Google UAC, AppLovin, Liftoff, Moloco) use engagement signals from your creatives to adjust bid prices. A playable with a 6% interaction rate generates richer signals than a video with a 1.2% CTA tap rate. Over time the system learns which segments engage with the playable and targets them more often, so the CPI gap tends to widen as data builds up.
A Worked Example: CPI Is Not the Whole Cost
The numbers below illustrate the arithmetic; they are not a benchmark. Say a video creative and a playable each spend the same amount over the same week to the same audience. The video produces installs at $2.00 each and the playable at $2.40. On CPI alone, the video wins.
Now add what happens after the install. Suppose 30 of every 100 video installs are still playing a week later, against 40 of every 100 playable installs. The cost of each retained player is the CPI divided by the share retained: $2.00 ÷ 0.30 is about $6.67 for video, and $2.40 ÷ 0.40 is $6.00 for the playable. The format that looked more expensive delivers the cheaper retained player.
The same arithmetic can run the other way, which is the point. Neither format wins in general; the one that wins is the one whose cost per valuable user is lower for your game, measured on your own cohorts. Pick the downstream event that matters to your business (a retained day, a finished tutorial, a first purchase) and divide spend by that, not only by installs.
When Video Still Wins
- Cold brand awareness: users with no prior exposure to your game benefit from video's storytelling (showing the game world, characters, and tone before asking for a tap).
- Complex game genres: strategy, RPG, and narrative games are hard to represent meaningfully in a 10-second interactive preview; a cinematic trailer communicates more.
- Retargeting: users who've already seen your app or lapsed players respond well to video (reminds them of something they already evaluated) without needing the mechanic preview.
- Fast-launch campaigns: building a quality playable takes hours; a video campaign can launch same-day with existing assets.
Measuring CPI Fairly: Apples to Apples
Comparing playable and video CPI in the same campaign is rarely fair: they're served to different audiences based on format compatibility, and they compete in different auction segments. The right comparison is a holdout test: same targeting, same budget window, same audience pool, split by format. Run both for at least 7 days and 3,000+ impressions per format before drawing conclusions. See playable ad A/B testing methodology for the framework.
What a CPI Comparison Can Hide
- Attribution differences. Playables and video may be credited under different windows or rules on the same network, especially where view-through attribution applies. Check which installs each report actually counts before comparing them.
- Privacy-limited measurement. On iOS much install data arrives aggregated and delayed through SKAdNetwork, which makes small format comparisons noisy. See SKAdNetwork and playables.
- Placement mix. If one format ran mostly in rewarded placements and the other in interstitials, you are partly comparing placements, not formats. See rewarded vs interstitial.
- Creative quality. A strong video against a weak playable proves nothing about formats. Compare your best of each, or several of each.
- The learning phase. A new creative in an ML-driven campaign is still being explored. Judge it after delivery has settled, not in its first days. See delivery and the learning phase.
Questions to Ask of Any Published Format Comparison
Claims that one format beats another circulate constantly in UA, usually from vendors, networks or case studies. Before letting one change your budget, ask:
- Which metric? A lower CPI and a better return on spend are different claims, and only one of them pays the bills.
- Which audience and genre? A result from hyper-casual inventory says little about a strategy game, and the reverse.
- Compared how? A holdout with matched targeting means far more than two campaigns that happened to run at the same time.
- Over what period? Novelty can flatter a new creative in its first weeks.
- Who published it, and what do they sell? A seller of playable inventory, or of playable production, has a reason to report the favourable result.
None of this means such claims are wrong. It means your own test, on your own game, is the only result that should move your budget.
Format Combination Strategy
Strong creative mixes use both: video for top-of-funnel reach and playables for mid-funnel conversion. On Google UAC, upload both a video and a playable HTML to the same campaign; the system serves each to the user segment most likely to convert via that format. On Meta, pair video in the news feed with a playable in the rewarded/interstitial placement of the same campaign.
The right question isn't which format wins
Ask instead: which format is right for this audience segment and this funnel stage? Playables pre-qualify intent at the install decision moment. Video builds genre awareness before that moment. Use both intentionally rather than choosing one.
Reporting the Result
When you share a format test with the rest of the team, write it up so the conclusion survives scrutiny:
- State the question: which format delivers cheaper valuable users for this audience on this network.
- State the setup: dates, audience, budget split, placements and the number of creatives per format.
- Give CPI and at least one downstream cost, such as cost per retained user or cost per payer, side by side.
- Say how confident you are. A small difference on a small sample is a reason to keep testing, not a verdict.
- Record the decision and a date to revisit it. Results change as creatives tire and audiences shift.
A test written up this way can be repeated next quarter and compared, which is worth more than any single answer. The metrics guide explains each metric in more depth.
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