How to do basic ASO with free tools

Most apps ship with a store listing that was written once, in a hurry, the week before launch — and never touched again. That's the single biggest free growth lever sitting untouched on the average app, because the words in that listing decide how many people ever find it. App Store Optimization sounds like it needs an expensive tool and a specialist on retainer. For the basics, it doesn't. You can do a genuinely useful first pass in an afternoon, for nothing.

Roughly 65% of App Store installs come via store search (Searchlab, 2026), with search driving about 58% of discovery on Google Play too (Digital Applied, 2026). So getting your metadata right is the highest-leverage thing a beginner can do. This guide walks the exact free workflow — six tools, in order — that we'd run on a brand-new listing, plus an honest line on where free stops and paid data begins.

What "basic ASO" actually means (and why metadata comes first)

Basic ASO is optimizing the parts of your listing the algorithm reads — title, subtitle, keyword field, description — and the parts users judge, like your icon and screenshots, so you rank for more searches and convert more of the people who find you. For a beginner with no budget, metadata is where you start: it's free to change, it's the single largest discovery channel, and ranking changes often appear within 1–4 weeks (ASOMobile, 2026).

Think of ASO as two halves. The first half is getting found — that's keywords, and it's mostly what this guide covers. The second half is convincing someone to install in the few seconds after they find you — that's your icon, screenshots, and ratings. Both matter, but metadata gives the fastest, cheapest feedback loop, which is exactly what you want when you're learning. Nail the free metadata pass first; creative testing and a reviews strategy come next. If you want the full picture this slots into, see how to build an effective ASO strategy.

Step 1 — Build and expand your keyword list

Start with a seed list of 10–20 words a real person would type to find an app like yours: features, the problem you solve, your category, and obvious synonyms. Then expand it. The Keyword Shuffler generates the valid keyword combinations the App Store can index from your individual terms, so you surface long-tail phrases — "photo editor collage," "budget tracker free" — that you'd never think to list by hand.

This matters more than it sounds, because Apple indexes combinations of your individual keywords across fields. You don't need a giant list; you need a small, well-chosen word set that combines into many real search phrases. With the App Store now holding around 2.19 million apps and Google Play over 2 million (Digital Applied, 2026), long-tail combinations are how a new app gets found without fighting the head terms every incumbent already owns. Choosing the right seeds is its own craft — that's the work behind app store keyword research.

Step 2 — Place your best keywords in the title and subtitle

Your title and subtitle carry the most ranking weight on the App Store, so your strongest, highest-relevance keywords belong there — not buried in the keyword field. Use the Metadata Character Counter to write a title (30 characters) and subtitle (30 characters) that pair your brand with your top keyword without spilling a character over and getting truncated mid-word in search results.

The limits differ by store, which trips up beginners running both. On the App Store you get a 30-character title, a 30-character subtitle, and the hidden 100-character keyword field. On Google Play you get a 30-character title and an 80-character short description, and there's no hidden keyword field — keywords live in the title and full description instead (ASO Pulse, 2026). Write each store's metadata for that store, not as a copy-paste of the other. For the title specifically, see how to optimize your app title; for the wider platform gaps, App Store vs. Google Play differences.

Step 3 — Pack the 100-character keyword field correctly

The App Store gives you a hidden 100-character keyword field, and most beginners waste a third of it. Three rules recover that space: separate terms with commas and no spaces, use the singular form only (Apple indexes both singular and plural from one root), and never repeat a word already in your title or subtitle, because those are already indexed (Appfigures, 2026). The Keyword Field Optimizer applies these rules and shows the characters you get back.

The same three mistakes turn up in nearly every beginner keyword field we audit. A space after each comma in a ten-keyword field quietly burns nine characters. Adding both "tracker" and "trackers" wastes another nine on a duplicate Apple already understands. And repeating your own app name or category word — already sitting in the title — wastes more still. Skip standalone filler like "app" and "free," save multi-word phrases for cases where the combination genuinely won't form on its own, and you'll often free 20–30 characters for entirely new terms (ASOMobile, 2026).

Step 4 — Catch wasted and repeated terms

Before anything goes live, check for repetition you can't spot by eye. The Keyword Density Checker scans your title, subtitle, keyword field, and description together and flags any word that appears more than once across them. On the App Store every duplicate is a pure waste of characters; in a Google Play description, over-repetition can read as keyword stuffing and work against you.

This cross-field view is the part manual editing misses, because the duplicate usually hides across two different fields — a word in your subtitle that you also typed into the keyword field. On Google Play, where keywords live in the title and full description, the goal is natural inclusion rather than density for its own sake; the two stores reward different things here (ASOMobile, 2026). Treat this as your final QA pass: every term earns its place exactly once.

Step 5 — See your listing the way users do

Keywords get you found; the listing gets you installed — and tap-through-to-install averages just 33.4% on iOS and 27.7% on Google Play, so first impressions carry real weight (Digital Applied, 2026). The Store Page Preview renders your title, subtitle, icon, and screenshots as they'll appear in search results and on the product page, so you catch truncation and a weak first screenshot before you publish, not after.

What you're checking for is the above-the-fold moment: the first one or two screenshots and the title do almost all of the converting, because that's all most people see before deciding. Preview the search-result card and the full page separately — a title that reads fine on the product page can truncate awkwardly in the search list. This is the bridge from "found" to "installed," and the deeper version of this work is how to increase your app conversion rate.

Step 6 — Capture extra markets for free

Here's the biggest free win most beginners never touch: the App Store indexes keywords from several localizations per country, not just the primary language. The Cross-Localization Explorer shows, for any country you sell in, the secondary localization keyword fields you can quietly fill to rank for more terms — without changing a single word of what users actually see in that storefront.

That means you can roughly expand your indexed keyword footprint in a market you already operate in, before you ever commit to a full translation. And when you are ready to translate properly, the payoff is large: localizing a listing into more than 10 languages increases downloads by an average of 128% (Searchlab, 2026). Start with the free hidden-field keywords, then graduate to real localization — the method is in localizing app screenshots for new markets, the work behind our localization service.

What free tools can't do (and when to go further)

Free tools are excellent at placement and packing — combining, counting, de-duplicating, previewing, and finding extra localization fields. What they can't give you is validated keyword data (real search volume and difficulty), rank tracking over time, competitor keyword-gap analysis, and A/B-tested creative. That's the paid layer that turns a good first pass into a program you can steer with evidence instead of intuition.

The honest framing: free gets you a listing that's done right; paid tells you whether it's the right listing, and proves it moved. A one-time free pass starts the clock, but durable gains from reviews and engagement take two to three months of consistent effort (ASOMobile, 2026) — which is maintenance, not a one-afternoon job. When you outgrow the free pass, the next step is choosing where to invest: see the best ASO tools in 2026 and the key features that actually matter in a paid tool.

The bottom line

A solid first pass at ASO is free and doable in an afternoon. The workflow, in order:

• Build the list: seed 10–20 terms, then expand into valid combinations with the Keyword Shuffler.
• Place the best ones: strongest keywords in the title and subtitle, sized with the Metadata Character Counter.
• Pack the field: commas, no spaces, singular only, no title duplicates — via the Keyword Field Optimizer.
• De-duplicate, preview, localize: the Density Checker, the Store Page Preview, and the Cross-Localization Explorer for free extra markets.

Free tools nail the mechanics; a paid layer adds validated data and testing. The fastest way to know whether your free pass is targeting the right keywords is a free ASO audit — we'll run your listing against professional data and hand back a prioritized fix list. Or just start now from the free ASO tools hub.