App Store Connect · Google Play Console

The mobile studio's ASO platform.Engineering precision for builders who ship.

DriveCode built Larko for its own apps: deep listing audits, byte-exact limits, and real protection from store policies.

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Apple Guideline 2.3.10 Guard
100-Byte UTF-8 Live Engine
Platform Limits

The exact numbers that decide your listing's ranking

Official engineering limits of Apple and Google. Violating them costs studios rejections or lost organic traffic.

Apple UTF-8
0bytes

iOS Keyword Limit

Counted in UTF-8 bytes. Non-Latin costs 2–3 bytes per char.

Google Play
0chars

Google Indexing

Full description is 100% indexed (Apple indexes 0 characters).

Max Assets
0/ 10

Screenshots & Assets

Up to 8 on Play, 10 on Apple. Only the first 3 appear in search results.

Cross-Store
0stores

Parallel Audit

Simultaneous cross-store audit in a single workspace.

Free Forever
0signup

Instant Access

Full engineering report with no sign up, trial, or card needed.

Larko Guard

Catch store rejections before Apple or Google review

A rejected build costs 2 to 5 days of lost release momentum. Larko scans metadata against official platform policies and gives 1-click deterministic fixes.

  • BlockerApp Review 2.3.10
    App Store
    SubtitleRival Platform
    Plant care tracker for iOS & Android

    Apple strictly rejects listings that mention Android anywhere in metadata.

    Release-safe replacement:
    Plant care tracker for iPhone & iPad
  • BlockerPlay Metadata Policy
    Google Play
    App TitleBanned Symbols
    Sprout — Plant Care 🌱 #1 FREE

    Google Play automatically blocks emoji and '#1 FREE' claims in titles.

    Release-safe replacement:
    Sprout: Mindful Plant Care
  • RiskApp Review 2.3.1
    App Store
    SubtitleUnverified Claims
    The best plant app you will ever use

    Unproven 'best' claims trigger immediate Guideline 2.3.1 rejections.

    Release-safe replacement:
    Mindful plant care & watering tracker

Larko never guesses with generic AI — every blocker cites the exact clause from Apple Guidelines and Google Play policies.

Launch Policy Guard Scanner
Cross-Store Asymmetry

One app — two completely different ranking algorithms

Google indexes roughly 25.7× more copy than Apple does. Copying your Play description into App Store Connect wastes 4,000 characters on a field Apple never reads for search.

25.7× Indexing Volume Gap

App Store

iOS Ecosystem
160 indexed
Apple Indexing Scale: 160 bytes4% of Google volume
  • Title
    30 chars
  • Subtitle
    30 chars
  • Keyword field
    100 bytes

Apple completely ignores the 4,000-character description for ranking — it is conversion-only.

Google Play

Android Ecosystem
4,110 indexed
Google Indexing Scale: 4,110 chars100% of Google volume
  • Title
    30 chars
  • Short description
    80 chars
  • Full description
    4,000 chars

Google has no hidden keyword field — all organic ranking comes from visible description copy.

Larko evaluates each store by its own unique algorithm, eliminating keyword cannibalization and blind spots.

Compare 2 stores
ASO Funnel

Three stages of organic growth: from search to install

  1. 01Stage 1

    User Search Intent

    water sort puzzle
    1
    water sort puzzleOrganic result
    Top result
    Search traffic
    How most users arrive

    Apple puts 65% of App Store downloads as starting in search — its own published figure. Most people search for a solution or a category ('habit tracker'), not a brand name.

  2. 02Stage 2

    Algorithmic Store Indexing

    Metadata fieldiOS (Apple)Google Play
    Title
    30 chars
    30 chars
    Subtitle
    30 chars
    —
    Short description
    —
    80 chars
    Keyword field
    100 bytes
    —
    Full description
    Not indexed
    4000 chars

    The store algorithm checks whether search terms match indexed metadata fields. If a keyword is missing from indexed fields, your app never enters the auction.

  3. 03Stage 3

    Visual Screenshot Conversion

    01
    02
    03
    04
    05
    06
    Visible SERP Zone (Top 3)
    Where the choice happens

    Ranking gets you seen; the first three screenshots close the install. Most people decide inside the search results, without ever opening the page.

Larko optimizes all 3 stages end-to-end, independently per store. Most tools only score surface words and leave conversion blind.

6-Factor Scoring Formula (Methodology)
Studio Portfolio

One listing is a task. A portfolio is a system.

When you manage 3 to 15 apps, ASO quickly turns into chaos: every release multiplies across two stores. Larko was built to monitor and sync both platforms in a unified interface.

Our own studio products (audited live on this request)

Early Access · Studio Beta

Larko Nest — Unified Studio Dashboard for Portfolios

Centralized monitoring for your entire app portfolio: automated weekly diffs, rejection risk alerts, and SERP visibility trends in a single unified view.

We are opening private beta access for studios with 3+ apps. Leave your email for priority onboarding.

Studio Toolkit

Four essential modules for complete ASO workflow

Built by DriveCode

From a studio that ships its own apps

4 Production AppsFlutter & Dart Native100% Dogfooded

Larko is engineered by DriveCode, a mobile Flutter development studio. Every app we launch lives simultaneously on the App Store and Google Play — exactly the daily workflow this platform solves.

We tested the platform on our own listings first and openly display our weakest scores. When a product is built to solve our own operational pains, there is zero fluff or artificial metrics.

Visit studio drivecode.ai
Studio Flagship: Live audit of our top app
Best audit
Cosmo Sudoku: Number PuzzleGoogle PlayUA
79B
Metadata & Freshness
10.0 / 10
Read full audit report
Method & Market

How Larko differs from other ASO tools

A transparent engineering comparison. Why mobile developers and studios choose deterministic rules over black boxes and expensive subscriptions.

Rejection Protection

LarkoOfficial 2.3 Rules

Direct citations of App Review Guidelines and Google Play Policy with ready-to-use safe fixes

ChatGPTRejection Risk
Traditional ASONo Scanner

Exact Limit Precision (UTF-8)

LarkoByte-Level Packer

Exact multibyte UTF-8 accounting (2 bytes/char for Cyrillic) in Apple's 100b field with zero cannibalization

ChatGPTCounts Characters
Traditional ASOBasic Counter

Cross-Store Parity

Larko1 View for 2 Stores

Synchronous side-by-side diff between iOS and Android accounting for Google's 4,000-char indexing

ChatGPTUnlinked
Traditional ASOSplit Reports

Pricing & Access

Larko100% Free

Full engineering audit report without signup, credit card, or paywalls

ChatGPTPaid Tier
Traditional ASO$69 – $500+/mo

Data Transparency

LarkoVerified Store APIs

Direct official Apple & Google Store APIs without hallucinations or fabricated metrics

ChatGPTHallucinations
Traditional ASOBlack Box

Based on publicly available documentation and pricing as of August 2026.

Transparent Model

How much does it cost: $0. And why this is a feature, not a catch.

No trials, no credit card required, and no hidden upgrade paywalls. Deterministic store checks don't burn expensive compute, which is why core audits are free for everyone.

6D ASO Store Audit100% Free · Unlimited

One direct call to official public store APIs and mathematical scoring. It incurs minimal server cost — so access is unlimited without signup.

Policy Guard & 100b Packer100% Free · Unlimited

Instant scan against official Apple 2.3 & Google Play rules. Rejection protection shouldn't cost developers a dime.

AI Analysis & InsightsFair-Use Limit

Deep written recommendations. Free within our generous daily fair-use limits per studio.

AI Metadata GenerationFair-Use Limit

Automated safe copy optimized for 30-char limits and 100-byte keyword limits.

Rank Tracking & HistoryComing Soon

Automated daily snapshot archive to monitor ranking dynamics and listing updates.

Larko Studio open access
Free forever

All core audit, keyword packer, and policy check tools are completely free with no registration required.

Local execution

Your metadata is never sold and never passed to a third party.

Server transparency

No hidden subscriptions. The deterministic check is free, unlimited, and needs no account.

Questions

The things worth asking first

Where does the data come from?
Apple's official iTunes Search and Lookup APIs, and Google Play's public listing pages. That is the whole list. We do not have keyword search volume — not from Apple's Search Ads API, not from a panel, not from anywhere — because we have not built that integration yet. When we do, this answer will change before the feature ships, not after.
Does the storefront I pick matter?
More than almost anything else. Both stores are per-country: an app published only in Ukraine is invisible to a US search, and its title is often localised too, so searching the wrong market returns somebody else's app rather than nothing. We cover 173 App Store storefronts — the list was built by asking Apple which regions actually respond, not by copying one.
What does it cost?
The checker is free and unlimited, with no account. That is deliberate: a deterministic check costs us a fetch and some arithmetic, so throttling it would only throttle the thing that earns us traffic. Metering will exist on the operations that cost real money — AI generation, which is not switched on yet — and we'll price those once we know anyone wants them.
Why does an 88 show a B?
Because a blocker or a critical finding holds the grade down. The score is a completeness measurement and we never touch it — if the arithmetic says 88, it says 88. But a listing that cannot publish as written does not earn an A for tidy metadata, so a blocker caps the grade at C and a critical finding caps it at B. The report always says which one did it.
Why do you label numbers as estimates?
Because they are. Neither store publishes raw search volume, so every figure in this category is modelled. Most tools present those models as fact. We attach the source, the retrieval date and a confidence level to every one, so you can judge it. In October 2025 Apple rescaled its popularity index by about 77% overnight and broke every ASO dashboard at once — that is exactly why provenance matters.
Do you actually support Google Play, or is it iOS with Android bolted on?
Both, at equal depth, and with different scoring rules for each — because the stores index different fields. Android is where the gap is: the closest competitor doesn't cover Play at all, and Play's 4,000-character indexed description is the largest unautomated surface in ASO.
Can Larko guarantee my app won't be rejected?
No, and anything that claims otherwise is lying. Guard catches what the published policies explicitly name — character limits, banned terms, emoji in Play titles, rival platforms in Apple metadata. It cannot predict a reviewer's judgement call. We deliberately keep the blocker list narrow and cited, because a false "you'll be rejected" costs more trust than a missed one.
Does an AI decide my score?
Not the numbers. Character counts, the Apple keyword field's 100-byte limit, banned words, screenshot counts and rating thresholds are computed in code — a model is never asked to count. AI handles judgement and writing, on top of arithmetic that is already correct.
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Check a listing

Any App Store or Google Play app. Yours or a competitor's. No account, no limit.

Analysed in secondsNo sign-up, no cardFull six-dimension report