App Store Screenshot Captions: 9 Tips That Get Read

The best App Store screenshot captions are short, benefit-led headlines of roughly 3–7 words, one idea per screenshot. Set them large enough to read at thumbnail size, in strong contrast against the background. Write the captions before you design anything. Then check them against both Apple's and Google's store rules and localize them for every market you ship to.

Below are nine practical screenshot caption tips, based on the official App Store Connect and Google Play Console guidance, plus a checklist you can run before every upload.

What are App Store screenshot captions?

An App Store screenshot caption is the short marketing text placed above or below the app UI in a store screenshot. It usually has a bold headline and sometimes a smaller subline, and it tells shoppers what the screen shows and why they should care. It is not part of your app's interface. It is a layer of copy you add on top when you design the screenshot.

Captions matter because people scan store listings quickly. Apple notes that the first one to three screenshots appear in search results when no app preview is available, depending on orientation. Those first images and their headlines often have to make the case for the whole app.

Is text allowed on App Store and Google Play screenshots?

Yes. Both stores allow text overlays, with conditions. Apple's App Review Guideline 2.3.3 says screenshots "should show the app in use, and not merely the title art, login page, or splash screen." It also says they "may also include text and image overlays." Guideline 2.3.7 adds that metadata, including screenshots, should not include prices or other descriptions that don't belong there (App Store Review Guidelines).

Google Play is stricter about app screenshot text. The Play Console preview assets guidance says:

• Add taglines only if they are needed to convey key characteristics of the app, and keep them to no more than 20% of the image.
• Avoid small text and backgrounds that compete with the text.
• Avoid calls to action such as "Download now," "Install now," "Play now" or "Try now."
• Don't suggest Play performance or rankings with words like "Best," "#1," "Top," "New," "Discount," "Sale" or "Million Downloads."
• Avoid time-sensitive taglines that will go out of date quickly.
• Localize any taglines or text overlays.

How long should a screenshot caption be?

Keep the headline short enough to read in about a second. In practice, that means roughly 3–7 words, with a subline of no more than one short line. This is a working rule of thumb, not a store requirement. The real limit is legibility, since shoppers see screenshots at thumbnail size in search results and can't zoom in.

A quick test: shrink the finished screenshot to the size of a search result thumbnail on your phone. If you can't read the headline at a glance, cut words or increase the type size. On Google Play, also confirm that the caption area stays under 20% of the image.

9 tips for writing captions that get read

1. Write the captions before you design

Draft all your headlines in a plain list first, one per screenshot. Read them in order and check that they tell a story: the core promise first, then the main features, then the extras. If the list doesn't make sense as text, design won't fix it.

2. Lead with the benefit, then name the feature

"Plan meals in 5 minutes" beats "Meal planner module." Apple's own advice is to "focus each subsequent screenshot on a main benefit or feature" (Apple Developer). Put the benefit in the headline and the feature name in the subline.

3. One idea per screenshot

Each caption should describe exactly what the screen below it shows. If the headline says "Track every habit" but the screenshot shows settings, shoppers notice the mismatch and stop trusting the listing.

4. Make the first three count

Because the first one to three images can appear in search results, the first headline should state the app's core value in plain words. Save secondary features such as widgets, Dark Mode or integrations for screenshots 4 and later.

5. Go big and high-contrast

Use a heavy, simple sans-serif and give the headline real size. A dark headline on a light backdrop, or the reverse, reads better than mid-gray on a gradient. Google specifically warns against backgrounds that compete with the text, so keep busy images behind the device, not behind the words.

6. Use the words people search for, naturally

Appfigures reported that Apple appears to extract text from screenshot captions and treat it as part of an app's keyword metadata. The same analysis notes that caption-only keywords seem to be a weaker signal on their own and that repeating them doesn't help. Apple has not officially documented this, so treat it as a bonus. If "budget tracker" is your main keyword, a caption like "Your budget tracker, simplified" helps shoppers and possibly search. Don't stuff keywords, and keep captions consistent with your app name, subtitle and keyword field.

7. Skip claims you can't keep

Leave out prices, "#1," "Best," "Sale," launch-week promotions and calls to action. They break Google Play's guidance, can clash with Apple's metadata rules, and go out of date. "Your notes, synced everywhere" will still be true next year. "50% off this week" won't.

8. Keep a consistent caption system

Use the same position, font, size and color logic on every screenshot. A consistent system makes the set read like a single sequence when shoppers swipe through it. Change one thing per screen, such as the accent color, if you want variety.

9. Localize, don't just translate

Both Apple and Google ask you to localize screenshots for each market. German and French captions often run longer than English, so leave room in your layout or rewrite the line instead of shrinking the type. Have a native speaker check that the benefit still lands.

Where should captions go: above or below the device?

Most apps put the caption above the device, because the headline is the first thing people read when scanning from the top. Place it below when the most important UI sits at the top of your screen and you want it fully visible. Whichever you choose, use the same position across the whole set.

Tilted device angles give a caption more breathing room. A hero-left or hero-right angle frees space beside the phone, which leaves room for a two-line headline without covering the UI. A flat front view keeps the screen as large as possible, which works better for dense interfaces.

How to add captions to device mockups in mockiso

In mockiso, captions are built into the mockup workflow, so you don't need a separate design file for basic store screenshots:

1. Create an account and start a New project.
2. Pick a device, for example an iPhone 17 Pro Max for the 6.9-inch iPhone slot or an iPad Pro 13″ for iPad (see the full device list).
3. Upload your screenshot by clicking, dragging and dropping, or pasting with Ctrl/Cmd+V.
4. Choose an angle preset such as front, hero left or float, then fine-tune the lens, yaw, pitch and scale.
5. Set a solid or gradient backdrop with enough contrast for your text, or start from one of the 70 backdrop templates.
6. Turn on the App Store style caption and type your headline and subline.
7. Use the duo or trio layout to show consecutive screenshots side by side.
8. Pick a store canvas size preset and export as PNG or JPEG. Choose an opaque backdrop rather than a transparent one, because App Store Connect doesn't accept alpha channels and Google Play requires PNGs without alpha.

One honest note for Android listings: Google Play's guidance lists device imagery as an element to avoid, because frames can date quickly. For Google Play, consider a flat front angle with a minimal frame, or test frameless screenshots. Device mockups still work well for the App Store, your website, press kits and social posts.

Key takeaways

• Keep each caption to one idea and roughly 3–7 words, and check that it is readable at search-result thumbnail size.
• Lead with the user benefit. Put the feature name in the subline.
• On Google Play, keep taglines to 20% of the image or less and avoid calls to action, rankings and sale language.
• App Store Connect accepts 1–10 screenshots per device size in JPEG or PNG without transparency. Google Play accepts up to 8 per device type.
• Localize captions for every market, and keep any keywords in captions consistent with your other metadata.

Write your captions, then render them

Good App Store screenshot captions come from clear copy first and a clean, consistent layout second. Draft your headlines, pick your angles, and render a full set of captioned device mockups in the browser. Start your free 24-hour Pro trial (no card required), or compare plans on the pricing page.