ASO vs. Paid Ads: Where Every Dollar Actually Goes

Paid ads buy installs. ASO buys positions. That's the one-line difference and it shapes everything else: cost per install over time, defensibility against competitors, and how each dollar compounds (or doesn't).

Here's the unit economics laid out, with a worked example from twelve real campaigns we ran across 2025.

What you actually pay for

Paid ads are simple: you pay per install. Apple Search Ads averages $2.85 CPI for non-game iOS apps in the US; Google UAC runs $1.50-$4.20 depending on category. The install arrives, you bill, the budget burns down. When you stop paying, the installs stop.

ASO is different: you pay for activity that moves your rank. The campaign costs are similar (keyword install campaigns at $0.27-$0.40/unit), but the install you bought today buys you a rank position you keep tomorrow. The position keeps earning organic installs after the campaign ends.

The same dollar spends differently:

Spend	Paid ads buy you	ASO buys you
$1,000	~350 installs, then nothing	~3,500 paid units + position holding for 30+ days
$5,000	~1,750 installs, then nothing	A defensible top-10 keyword position
$20,000	~7,000 installs, then nothing	A category-chart position generating organic forever

Worked example: 12 campaigns, same budget, different mechanics

Across 12 customer campaigns in 2025 (six paid, six ASO, same $4,000 budget each, similar app categories), here's how the install totals played out over 90 days:

Channel	Day 0-30 installs	Day 31-60 installs (organic carryover)	Day 61-90 installs	Total
Paid ads (avg of 6)	1,420	35	12	1,467
ASO drip + reviews (avg of 6)	1,180	920	640	2,740

Paid front-loads. ASO compounds. Across 90 days the ASO budget delivered 87% more total installs than the paid budget, but the difference grows the longer you wait. By day 180 the gap was 2.4x.

The cost per install:

• Paid ads: $4,000 / 1,467 = $2.73 CPI
• ASO: $4,000 / 2,740 = $1.46 CPI

ASO came in 47% cheaper per install at the 90-day mark.

When paid ads actually win

Three scenarios where paid ads are the right pick:

1. You need 10,000 installs by Friday. ASO campaigns lift rank over 14-21 days. If you need volume immediately, paid is faster.
2. You're testing a new market. Paid traffic lets you measure CVR by demographic, locale, or device before you commit to ASO in that market.
3. Your rating is below 3.8. Don't spend on ASO until rating is fixed; impressions on a 3.5-star app convert at half the rate they should. Run a small paid campaign to gather analytics while you fix rating, then switch.

When ASO wins (almost always otherwise)

The remaining scenarios:

1. You're building a long-term business. Compound rank is more valuable than rented installs.
2. You operate in a category-search-heavy vertical. Productivity, fitness, utilities, and finance apps live and die by search. ASO is the channel.
3. You're competing on budget. A $4K monthly ASO commitment outperforms a $4K monthly paid commitment by 2-3x over the first 90 days.
4. You want defensibility. A rank position is harder for a competitor to take from you than a CPM auction slot.

The realistic split: both, but not 50/50

The split that works for the customers who grow fastest is roughly:

• 70% ASO budget — paced campaigns on keywords + category chart + rating + reviews
• 30% paid ads budget — Apple Search Ads on the same keywords to stack the organic boost (per the 2026 algorithm update) and Google UAC on retention-positive audiences

Paid feeds you data and short-term volume. ASO compounds. Running both at this ratio means you get the immediate signal from paid plus the long-term position from ASO.

What this means for your next budget cycle

If you're heavy on paid right now, the easy test is: take 30% of next quarter's paid budget and route it to a single ASO drip campaign on one keyword + a review order. Measure the rank lift, the CVR change, and the organic install carryover at day 60. The math will pick the channel for you.

For the campaign mechanics, see Step-by-Step: Launch a Keyword Install Campaign. For the broader strategy framework, see 5 ASO Strategies That Doubled Our Customers' Installs.

Frequently asked questions

Is ASO better than paid ads?

ASO compounds; paid doesn't. For long-term growth and unit economics ASO wins almost always. Paid ads win when you need immediate volume, are testing a new market, or have a rating issue that needs fixing before ASO spend will work.

What's the cost per install for ASO vs paid ads?

In our data across 12 customer campaigns of equal budget, paid ads landed at $2.73 CPI and ASO landed at $1.46 CPI at the 90-day mark. The gap widens over time because ASO continues earning organic installs after the campaign ends.

Should I do ASO before paid ads, or both at the same time?

Both, at roughly 70% ASO / 30% paid. The 2026 algorithm change rewards apps running Search Ads bids on terms where they also have organic install momentum, so the two channels stack.

How long until ASO catches up to paid ad volume?

At equal budgets, ASO typically catches up to paid total installs by Day 14-21 and lapses it by Day 30. From Day 30 onward, the organic carryover from ASO continues delivering installs at near-zero marginal cost.

Can I rank without buying any installs?

You can move metadata, screenshots, and reviews organically and that helps. Moving keyword rank without install velocity is much harder; the algorithm specifically weights install velocity as a relevance signal.

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The full ASO playbook is in App Store Optimization: The Complete 2026 Guide.