Every MB Costs You Installs, Retention, OPEX...

Size Is a Conversion Killer

The path from ad click to installed game has one major friction point: the download. Google's internal research on Play Store data established the baseline relationship that the industry still references:

This isn't theoretical. It's observed behavior across millions of installs. And the relationship holds in both directions—smaller apps convert better.

The 200 MB cliff. Both iOS and Android trigger a WiFi-only warning when downloads exceed ~200 MB on cellular. Users who see this prompt either cancel outright or defer the download "until later"—and most never return. Crossing this threshold causes a 15-25% immediate drop in conversion.

Emerging markets amplify the effect. In India, Brazil, Indonesia, and similar markets where data is expensive and storage is constrained, the sensitivity is roughly 2.5× higher. A 10 MB reduction in these regions correlates with ~2.5% better conversion, compared to ~1% in developed markets.

What this means for CPI: If your CVR drops, your effective Cost Per Install rises proportionally. In competitive genres where CPMs are fixed, a 50 MB size penalty can functionally double your acquisition costs—making paid UA non-viable.

Source: Google Play Apps & Games – Shrinking APKs, Growing Installs

Large Games Get Deleted First

Getting a user to install is only half the problem. Keeping them installed is the other half.

The storage purge. When a device approaches 90% capacity, users start deleting apps. Industry data consistently shows that the largest apps are the first to go—regardless of how much the user enjoys them. "Insufficient storage" ranks in the top 3 reasons for uninstalls across multiple studies.

Games with footprints exceeding 2 GB experience 10-15% higher churn between Day 7 and Day 30 compared to similar titles under 500 MB—driven entirely by storage management, not dissatisfaction with gameplay.

Loading times compound the problem. Slow initial loads cause players to abandon before they ever experience the game:

For comparison, top-quartile games lose only 24% by minute 10. The gap is almost entirely technical.

Sources: Google Play – Why the First Ten Minutes Is Crucial, Embrace – Technical Churn

Small Retention Gains Have Outsized Impact

The relationship between retention and profitability is nonlinear. Small improvements in player retention create disproportionately large gains in lifetime value.

This is well-documented across SaaS, e-commerce, and gaming. The mechanism is straightforward: retained users monetize longer, refer others, and cost nothing to re-acquire.

In mobile games specifically, Day 1 retention sets the ceiling for all subsequent retention metrics. If technical issues (loading, crashes, storage) cause players to churn before they experience core gameplay, no amount of content or live-ops can recover them.

Industry Retention Benchmarks

Apps lose 77% of daily active users within the first three days. The window to make a technical impression is measured in seconds.

Sources: TapResearch – Retention Strategy, Business of Apps – Mobile Game Retention Rates

60-80% of Your Build Is Visual Assets

Textures, sprites, and images typically comprise the majority of a mobile game's install size. This makes texture compression the highest-leverage optimization available.

For a 500 MB game, that's the difference between triggering the WiFi warning and fitting comfortably under the threshold.

Equally important: decompression speed. Traditional supercompression formats trade file size for CPU time during decode—replacing download friction with loading friction. The goal is to achieve both: smaller files and faster loading.

→ See how OAT achieves this

Lower Operational Costs at Scale

The benefits compound on the cost side too. For live-service games that push regular updates, patches, and new content, bandwidth and storage costs scale directly with player base and update frequency.

If textures comprise 60-80% of your asset bundles, a 50% reduction in texture size translates to 30-40% less data transferred per update. For a game with millions of active players, this means:

• Lower CDN egress costs — Every terabyte served costs real money. Halving texture payloads halves that line item.
• Reduced cloud storage costs — Smaller asset bundles mean smaller storage footprint across your delivery infrastructure.
• Faster patch downloads for players — Which also improves update adoption rates and reduces version fragmentation.

The savings scale linearly with your success. The bigger your player base, the more you save.

The Numbers at a Glance