Is CPT the same as CPC?

Yes, conceptually. Apple uses the term Cost Per Tap (CPT) instead of Cost Per Click because users tap on mobile rather than click. The auction mechanics are equivalent to Google Ads CPC bidding.

How does Apple Search Ads set the actual CPT I pay?

Apple Search Ads runs a second-price auction. You bid your maximum CPT; if you win, you pay one cent above the next-highest competing bid, subject to the ad group bid floor. So your average CPT is almost always below your maximum CPT.

Should I focus on CPT or CPI for optimization?

Focus on CPI as the outcome metric — it directly maps to LTV economics. But the levers to move CPI are split: ~50% from CPT (bid management) and ~50% from conversion rate (product page, relevance, match type). Always look at both.

What is CPT in Apple Search Ads? Cost Per Tap Explained

What is CPT?

Cost Per Tap (CPT) is the amount Apple Search Ads charges for each tap on your ad. It is the actual billing unit. Every other ASA cost metric — CPI, CPA, ROAS — is derived from CPT combined with conversion data.

You set a maximum CPT when creating a keyword or enabling Search Match. The auction then determines your actual CPT for each tap.

How the auction sets CPT

Apple Search Ads uses a second-price auction. The mechanic:

You bid your maximum CPT — say $3.00.
The next-highest competing bid in the same auction is $1.85.
You win the auction.
You pay $1.86 (one cent above the second-highest bid), not your $3.00 maximum.

This is why your average CPT is almost always lower than your maximum CPT. Pay close attention to the gap between bid and average paid CPT in the dashboard — a small gap indicates strong competition; a large gap suggests room to lower your maximum without losing volume.

CPT vs CPI

Metric	What it represents	How it’s computed
CPT	Billing unit per tap	Set by the second-price auction
CPI	Cost per attributed install	CPT × (Taps ÷ Installs), or equivalently CPT ÷ CR

A $2 CPT with 40% conversion rate produces a $5 CPI. The same $2 CPT with 20% conversion rate produces $10 CPI. You can lower CPI without changing CPT by improving tap-to-install conversion rate (better product page, tighter keyword relevance, fewer Search Match leaks).

When to lower CPT

Tap volume is healthy but the keyword’s conversion rate is below 30%. Lower CPT 10-20% and observe; if volume holds at the lower CPT, the auction is overpriced.
You’re hitting daily cap consistently with declining CR. Lower bid to slow pacing and preserve quality.
Brand keywords show CPT inflation. Brand intent should convert at 60-90%; if CPT is climbing without CR support, competitor conquest may be pushing the floor up.

When to raise CPT

Impression share is below 50% on high-CR keywords. You’re being outbid.
Tap volume is below daily cap with strong CR. Higher bid will buy proportional volume.
New campaign in ramp-up phase. Bid aggressive for 14 days to gather data, then trim.

How ASAPilot helps

ASAPilot’s account audit checks CPT-vs-CR efficiency per keyword and surfaces:

Keywords with CPT ≥ 2× ad-group average AND CR < 30% (overpaying for low-intent)
Keywords with CPT close to bid (auction pressure rising)
Keywords where lowering CPT 10% historically maintained volume (room to trim)

See the audit guide for the manual workflow, or pricing for ASAPilot plan tiers.

CPI — the derived install-cost metric
Bid Floor — the minimum CPT Apple enforces
Apple Search Ads — the platform