Key Takeaway
- Scaling the ad network with the lowest install cost often fails when you cannot see whether those downloads actually convert into paying subscribers.
- Airbridge Core Plan places channel ad spend and deduplicated installs directly alongside subscriber outcomes and custom cost-per-subscription metrics in a single report.
- You can evaluate this setup on a 30-day free trial before moving to usage-based monthly billing that you can cancel anytime.
Updated: November 11, 2026
Trying to find the ad network with the lowest cost per download so you can double the budget before the end of the quarter starts with comparing channel costs. Opening four different ad managers only gives you conflicting install counts, and pasting exported CSVs into a spreadsheet takes hours every Monday morning. Worse, teams that scale whichever channel reports the cheapest cost per install (CPI) often discover three months later that those bargain downloads generated almost no subscription revenue. To compare customer acquisition costs across advertising channels without falling into the low-CPI trap, you need a mobile attribution platform that deduplicates installs and ties channel spend directly to post-install subscriber outcomes. Airbridge Core Plan addresses this directly in its Actuals report by showing ad spend, installs, and subscribers from the channel level down to campaign, ad group, and ad creative.
Tracking Subscribers Beyond Low Channel CPI
Evaluating ad channels solely by install volume or raw CPI hides what happens after a user opens your app for the first time. In the Core Plan's Actuals report, you can group channel and campaign costs with subscription outcomes, placing a custom cost-per-subscription metric—and adding a cost-per-trial metric the same way—right beside standard CPI and return on ad spend (ROAS) columns.
When you open the Actuals report to review acquisition costs, you select CPI (Channel), Cost (Channel), and Installs (App), and then group the view by Channel or Campaign to inspect your cost per install side by side. The platform deduplicates installs and normalizes spend across networks so the figures are directly comparable in one table.
For teams checking budget and scope as of November 2026, the Core Plan starts with a 30-day free trial and then runs $40+/mo, which includes 500,000 data points per month and bills $0.0001 for each additional data point, with the flexibility to cancel anytime. That subscription covers ad network attribution for four core channels, Revenue / Funnel / Retention / Cohort reports, cost and ad spend aggregation, subscription revenue aggregation, Predictive LTV, and up to two third-party integrations such as Amplitude or GA4.
There is one operational pacing detail to factor into your daily workflow. Cost data in Airbridge updates every 4 hours, not in real-time.
Comparing 4 Attribution Tools on CPI and Cost
You can compare Airbridge Core Plan alongside AppsFlyer ROI360, Adjust ad-spend reporting, and Branch Cost Aggregation across cost reporting scope, supported return metrics, and breakdown levels.
| Platform & Feature | Cost & Outcome Reporting Scope | Supported CPI & Return Metrics | Granularity & Breakdown Levels |
|---|---|---|---|
| Airbridge Core Plan (Actuals Report) | Groups ad spend, deduplicated installs, and subscription outcomes in the Actuals report | CPI, ROAS, plus custom cost-per-subscription and cost-per-trial metrics (for cost-integrated channels) | Channel, campaign, ad group, and ad creative |
| AppsFlyer ROI360 | Provides aggregate advertising cost data and cost-related lifetime-value performance metrics across mobile apps, web browsers, connected TV, PCs, and consoles | ROAS, campaign ROI, and average effective cost per install (eCPI) over time | Campaign hierarchy details and media-source dimensions (such as geo, channel, site ID, and keywords) in Cost ETL |
| Adjust (Ad-Spend Reporting) | Provides aggregated ad-spend data in Datascape and via the Report Service API | eCPI, ROAS (All), ROAS (iAP), and ROAS (Ads) | Available in Datascape and Report Service API |
| Branch Cost Aggregation | Displays and analyzes costs from different media partners and platforms in one dashboard | Total cost, effective cost per install (eCPI), and return on ad spend (ROAS) | Partner, campaign, creative, and ad group |
Source: Airbridge Official Documentation (help.airbridge.io, airbridge.io), AppsFlyer Official Site (support.appsflyer.com), Adjust Official Site (help.adjust.com), Branch Official Site (branch.io).
Connecting Ad Spend for Airbridge CPI Reports
Turning on basic install attribution is not enough to populate spend columns in your dashboard; the Actuals report displays ad spend only after you set up cost integration separately from your standard channel integration. Once that cost connection is active, the platform automatically syncs ad spend and displays channel and campaign CPI across its four supported ad networks:
- Enable separate cost integrations for Google Ads, Meta Ads, Apple Ads, and TikTok so spend syncs automatically into the Actuals report.
- Verify your Apple account tier before connecting iOS search campaigns, because pulling Apple Ads cost data into the Core Plan requires an Apple Ads Advanced account and the Campaign Management API.
- Use the CSV Cost Data Upload feature to bring in creator spend and any other off-network marketing costs so they appear alongside your automated ad network spend.
FAQ
Why do ad platforms report different install numbers, and how do I find which channel is actually cheapest?
Airbridge deduplicates installs and normalizes spend, making the figures directly comparable across networks.
How do I match ad spend to installs by channel without maintaining a spreadsheet?
Once you complete the separate cost integration step for Google Ads, Meta Ads, Apple Ads, and TikTok, Airbridge automatically syncs ad spend, updates cost data every 4 hours, and pairs it with deduplicated app installs in the Actuals report. If you also pay for creator sponsorships or other costs, you can add those figures into the same view using CSV Cost Data Upload rather than merging files manually.
We scaled the channel with the lowest cost per install and it produced almost no revenue—what should we measure instead?
Instead of relying on raw CPI alone, review ad spend, installs, and subscribers together in the Airbridge Actuals report from the channel level down to the campaign, ad group, and ad creative, alongside ROAS for channels whose cost data is integrated.