Updated ASO teardown, US App Store
Cronometer: Calorie Counter 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
- 430K+1.3% vs previous month
- Est. monthly revenue
- $971K+1.4% vs previous month
- Est. revenue ÷ downloads
- $2.26
- Rating
- 4.8★100.3K 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
9 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
Science-backed nutrition tracker.
- nutrition trackernot in name
- What it shows
- A large white caption over a dark food photo, a tilted phone at the right edge with the food diary, and 4.5 stars above “Loved by 15+ million people.”
- Why it converts
- Says what the app is in the first words a visitor reads, then adds a rating and a user count on the same frame.
#2In search results
- What it shows
- The Cronometer logo above the other half of the tilted phone, which continues from screenshot 1 and shows today's targets at 88%, 102%, 69% and 94%.
- Why it converts
- Joins the first image into one wide panel. On its own it has no caption, so this search-result slot goes to a logo instead of a second reason to download.
#3In search results
Go beyond calories and macros.
- macrosnot in name
- micronutrientsnot in name
- What it shows
- A Daily Report with macronutrient bars and vitamin and mineral targets, under the subline “Track up to 95 macro and micronutrients - for free.”
- Why it converts
- Separates the app from a plain calorie counter by naming what else it tracks.
#4
Accurate data you can trust.
- What it shows
- A food entry for skinless chicken breast with “85 Listed Nutrients” and “Data Source: NCCDB”, under the subline “Nutrient information from verified, lab-analyzed data.”
- Why it converts
- Names a data source on screen, which is more specific than a general promise. The caption is the app's own claim; the image shows the label, not how the data is checked.
#5
Snap a photo, log your food.
- log foodnot in name
- food photonot in name
- What it shows
- A hand holding a phone over a grain bowl, with the Photo Log camera screen framing the same bowl, under the subline “Easily log meals with our AI Photo Logging feature.”
- Why it converts
- Shows a low-effort way to log, for people who don't want to type every meal. A real hand and real food make the action clear at a glance.
#6
Know exactly what you’re eating.
- What it shows
- The Report tab with a daily average for May 27 to Jun 2, 2026: 2260 kcal consumed, split by protein, carbs, fat and alcohol, and 2307 kcal expenditure.
- Why it converts
- Closes on what logging gives you: a weekly summary of food and energy. The caption states a benefit, and the rings keep the main numbers easy to read.
Icon and design system
What makes the page read as one brand at a glance.
- One symbol, a target with an arrow, suggests goals. It doesn't say “food”, so the name does that work.
- The same target is the logo on screenshot 2 and in the app header on screenshot 6, and it's orange in the header, so icon and gallery connect.
- White lines on flat orange with no text, so the shape holds up at small sizes.
- 01
Trust on the first screenshot
A star rating and “Loved by 15+ million people” sit beside the main claim. A second proof point, the NCCDB data source, follows on screenshot 4.
- 02
A panorama across the first two images
One tilted phone spans screenshots 1 and 2 on the same food photo. It looks wide in search results, but the second half carries only a logo.
- 03
Headline first, specifics in the subline
Most headlines state a benefit. The concrete facts, such as 95 nutrients and AI Photo Logging, sit in a subline below it.
- 04
Three visual styles in one set
Dark photo, flat navy and light backgrounds alternate, and phone framing changes from a tilted crop to a centered device to a hand-held phone. The bold headline font is what holds the set together.
- 05
A broad name, a specific set
The name says calorie counter. The captions add nutrition tracking, macros, micronutrients and photo logging, so visitors with those needs see them named.
ASO score breakdown
88 of 100 points. The full rule is under “How the ASO score works” below.
- App name24 / 25
- Uses 27 of 30 characters9/10
- Brand + keyword phrase10/10
- Keywords fill half the name or more5/5
- Screenshots24 / 35
- Caption on every screenshot4.2/5
- Each caption names a feature people search for5/10
- First screenshot shows the main use5/5
- One consistent design system0/5
- Readable at search-result size5/5
- Trust signal5/5
- Ratings25 / 25
- 4.8 average (full marks at 4.8)15/15
- 100,268 ratings (full marks at 100,000)10/10
- Freshness15 / 15
- Last update 1 days ago (full marks within 30)15/15
Where the points are
- Check caption terms against your subtitle and keywords
5 caption terms aren't in the app name: nutrition tracker, macros, micronutrients, log food, food photo. 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.
- Say what the app is in the first words of screenshot 1.
- If you have a real rating or user count, place it on screenshot 1 next to the main use.
- Put your most specific fact in the headline, not only in the subline.
- Give every screenshot a caption, including one that continues a panorama.
- Name your data source when accuracy is part of your promise.
- Show the easiest way to do the core task, such as a photo instead of typing.
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 “Cronometer: Calorie Counter”, which uses 27. 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. Cronometer uses them for nutrition tracker and macros.
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. Cronometer uses 9.
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.
- Cronometer: Calorie Counter 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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