Updated ASO teardown, US App Store
Nerva: Gut-Brain Program App Store optimization
A Health & Fitness app's App Store page, taken apart: the screenshots and why each one helps people decide to download, the icon and design system, and an ASO score out of 100.
- Est. monthly downloads
- 4K−11.3% vs previous month
- Est. monthly revenue
- $200K+0% vs previous month
- Est. revenue ÷ downloads
- $50.00
- Rating
- 4.7★15.2K ratings
Downloads and revenue are third-party est. for the US App Store, latest month vs the month before. Revenue includes renewals, so revenue ÷ downloads is a rough ratio, not what a new user pays. Estimates as of ; rating and dates from the App Store, .
Screenshots and why they convert
8 screenshots of up to 10, the first 6 shown here. The first 3 show in search results when there's no preview video.
#1In search results
Gut-brain therapy, tailored to you
- gut-brain therapynot in name
- What it shows
- The app icon above the headline, a tilted phone with a greeting and a session intro, and a Trustpilot star rating with New Scientist, Well+Good and The New York Times logos.
- Why it converts
- Names the kind of help (gut-brain therapy) in the first line, so a visitor knows what the app is. Ratings and press logos sit in the same frame, which matters for a health app. The logos are shown as printed; the image does not say what each outlet wrote.
#2In search results
Target the root cause Calm the miscommunication between your gut and brain.
- gutin name
- What it shows
- An illustration of a brain linked to a gut by a line with arrows in both directions, with part of a phone screen at the left edge.
- Why it converts
- A simple picture explains the idea behind the app, which is hard to show with UI. The phone is cropped and secondary, so the drawing carries the message.
#3In search results
Clinically proven results 81% clinically improved symptom management in Monash University randomized controlled trial.
- symptom managementnot in name
- What it shows
- A paper from The American Journal of Gastroenterology with a Monash University logo and a chart, plus a full citation printed at the bottom.
- Why it converts
- Gives a named data source and a citation, which is the kind of trust signal a health visitor looks for. The 81% figure and "clinically proven" are the app's own claims, quoted as printed. The paper text is too small to read at search size, so the caption carries the point.
#4
Personalized program 6 weeks of gut-brain therapy with long term flare up tools.
- personalized programnot in name
- What it shows
- A full-screen audio player with a track called "Old Bookstore", 12 minutes long, with a pause button and a progress bar at 02:27.
- Why it converts
- Shows what a session looks like and states the program length. The player is mostly empty, so it explains little beyond the caption.
#5
Extra support tools Breathing exercises and readings for support between sessions.
- breathing exercisesnot in name
- What it shows
- A sheet with Breathing exercises and Further readings cards, and a weekly program list where Week 1 and Week 2 are marked Complete and Week 3 is locked.
- Why it converts
- Shows there is more than the sessions, and the week list shows how the program is structured. Large cards keep the labels readable.
#6
Understand your gut Explore your flare-ups and track your symptom progress.
- flare-upsnot in name
- symptomnot in name
- What it shows
- A "Record your symptoms" form with sliders from None to Very severe for overall symptoms, bloating, pain and nausea.
- Why it converts
- Shows the tracking feature in use with plain labels a visitor with these symptoms would recognize. The caption names flare-ups and symptoms, words that visitor may use.
Icon and design system
What makes the page read as one brand at a glance.
- One abstract shape on a flat green field. It is simple, but it does not say "gut" or "therapy" on its own.
- No text and no fine detail, so it stays clear at small sizes.
- The same dark green and white appear in the screenshots, so the icon and the gallery read as one brand.
- 01
Headline plus one supporting sentence
Most images have a bold white headline and a one-sentence line under it.
- 02
Trust first, then proof
The first image carries a Trustpilot rating and press logos. A later image shows a named journal paper with a full citation.
- 03
Mostly one idea per image
Gut-brain link, trial result, program, extra tools, symptom tracking. Most images sell a single thing.
- 04
Phone as a prop
The phone is tilted, cropped or half-covered on some images. An illustration or a paper takes the lead when UI would not sell the idea.
- 05
One calm color system
A dark green gradient, white text and soft mint accents run through the set. The look fits the calming subject.
ASO score breakdown
92 of 100 points. The full rule is under “How the ASO score works” below.
- App name23 / 25
- Uses 24 of 30 characters8/10
- Brand + keyword phrase10/10
- Keywords fill half the name or more5/5
- Screenshots35 / 35
- Caption on every screenshot5/5
- Each caption names a feature people search for10/10
- First screenshot shows the main use5/5
- One consistent design system5/5
- Readable at search-result size5/5
- Trust signal5/5
- Ratings19 / 25
- 4.7 average (full marks at 4.8)13.1/15
- 15,173 ratings (full marks at 100,000)5.9/10
- Freshness15 / 15
- Last update 0 days ago (full marks within 30)15/15
Where the points are
- Ask happy users for a rating+6 pts
4.7 stars from 15,173 ratings. Apple's in-app rating prompt can be shown up to 3 times a year; show it right after a user finishes something in the app.
- Use the rest of the app name+2 pts
6 characters are free. Add the next most important search term.
- Check caption terms against your subtitle and keywords
6 caption terms aren't in the app name: gut-brain therapy, symptom management, personalized program, breathing exercises, flare-ups, symptom. Captions don't count for search; the subtitle and the 100-character keyword field do.
Apply it to your app
A checklist for your next product page update.
- Name what the app does in the first headline, in the words a visitor would use.
- Put your strongest real trust signal in the first image, and only use ones you can back up.
- Show a named source and a full citation when you quote a study result.
- Use a simple drawing when UI cannot explain the idea behind your app.
- Write one headline and one short sentence per image, and keep the headline big.
- Make the icon say what the app is, or pair it with a first image that does.
How the ASO score works
- 01
App name, 25 points
Up to 10 for how much of Apple's 30 characters it uses, 10 for a brand + keyword structure, 5 when keywords fill half the name or more.
- 02
Screenshots, 35 points
Captions on every image, captions that name searched features, a first screenshot that shows the main use, one design system, readability at search size, and a trust signal.
- 03
Ratings, 25 points
Up to 15 for the average (from 4.0, full marks at 4.8) and 10 for the count (from 1,000, full marks at 100,000 ratings).
- 04
Freshness, 15 points
Full marks for an update in the last 30 days, falling to zero at 180 days. 85+ is excellent, 70+ strong, 50+ fair.
Common questions
What is an ASO score?
A 100-point check of the parts of an App Store page you control: the app name, screenshots, ratings and how recently the app was updated. It's our own scoring rule, shown in full on this page, not a number from Apple. Use it to compare your page with apps that already sell well in your category.
How long can an app name be on the App Store?
30 characters. A common pattern is a short brand followed by the main thing people search for, like “Nerva: Gut-Brain Program”, which uses 24. Apple also gives you a 30-character subtitle and a 100-character keyword field for more terms.
Which screenshots show up in App Store search results?
The first one to three, when the app has no preview video. That's why the first three should cover the main reasons people download. Nerva uses them for gut-brain therapy, gut and symptom management.
How many screenshots can an iPhone app have?
Up to 10 per device size. Apple recommends focusing each screenshot after the first on one main benefit or feature. Nerva uses 8.
Where do the download and revenue numbers come from?
They're third-party estimates for the US App Store, not figures reported by the developer. Treat them as a sense of scale. Growth compares the latest month with the month before.
Do screenshot captions help an app rank in search?
Apple says search results use text matches in the app name, subtitle, keywords and primary category, plus user behavior such as downloads, ratings and reviews. Captions aren't on that list: they help people who already see the app decide to download. When a caption names something people search for, put that term in the keyword field too.
Where the numbers come from
- Apple: Creating your product page
- App name limit (30 characters), up to 10 screenshots, the first one to three shown in search results, keyword field.
- Apple: App Store search
- Search results use text relevance (name, subtitle, keywords, primary category) and user behavior (downloads, ratings, reviews).
- Apple: Ratings, reviews and responses
- The in-app rating prompt can be shown up to three times in a 365-day period.
- Nerva: Gut-Brain Program on the App Store
- Name, developer, category, icon, screenshots, rating, release and update dates (US storefront), checked Nov 4, 2026.
- Downloads and revenue
- Third-party est. for the US App Store, latest month, pulled Oct 29, 2026. Not reported by the developer.
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