AppStore (App Store, Amazon Appstore)

Apple's marketplace is spelled "App Store" (two words). Amazon's marketplace is "Amazon Appstore" (Appstore as one word). Use lowercase "app store" for generic references. Below are quick rules, hyphenation notes, many concrete wrong/right pairs, rewrite templates, a mnemonic, and a short FAQ you can copy into style guides.

Quick answer

Apple = App Store (two words, title case). Amazon = Amazon Appstore (vendor name + one-word Appstore). Use lowercase "app store" only when you mean marketplaces in general.

App Store - Apple's official name (two words).
Amazon Appstore - Amazon's official name (Appstore attached).
app store - generic noun, lowercase.

Core explanation: why the space matters

These are brand names, not interchangeable spellings. Copy the vendor's exact form when you name a specific marketplace; doing otherwise looks unprofessional and can confuse readers about which platform you mean.

Brand names follow the vendor: App Store (Apple) vs Amazon Appstore (Amazon).
When you mean any marketplace, use the lowercase common noun: app store.

Spacing & capitalization rules (checklist)

Pick one of these based on what you mean and stay consistent.

If you mean Apple, write "App Store" (two words, title case).
If you mean Amazon, write "Amazon Appstore" (no space between App and store).
If you mean marketplaces in general, use "app store" lowercase.
Do not invent "AppStore" (camelCase) for Apple or add a space inside "Amazon Appstore."

Hyphenation and compound modifiers

Don't hyphenate brand names. If a phrase would become a compound modifier, rewrite it so the brand follows the noun.

Good: the App Store listing.
Better rewrite for clarity: listing on the App Store.
Avoid: App-Store listing or Amazon-Appstore update (these change the brand form).

Bad modifier: We updated the App-Store screenshots.
Good rewrite: We updated the screenshots on the App Store.

Grammar: proper noun vs common noun

Treat App Store and Amazon Appstore as proper nouns when naming those services. Use lowercase app store when referring to marketplaces generically.

Proper noun → App Store, Amazon Appstore (capitalize as branded).
Common noun → app store (lowercase when non-branded).
Follow your publisher's headline style, but never alter the brand's internal spacing.

Real usage: work, school, and casual examples

Copy these short, context-specific sentences directly into emails, reports, or assignments.

Work - 1: Please attach the App Store screenshot to the release notes.
Work - 2: Q3 installs from the Amazon Appstore rose 12% month over month.
Work - 3: Update the App Store listing before the marketing push.
School - 1: Cite the App Store as the source for the iOS app in your bibliography.
School - 2: The study compared app store review policies across platforms.
School - 3: Download the dataset from the Amazon Appstore developer page and include the reference.
Casual - 1: Just grabbed it from the App Store-works great on my iPhone.
Casual - 2: Got the game from the Amazon Appstore for my Fire tablet.
Casual - 3: Is the app available on any app store? I can't find it.

Try your own sentence

Read the whole sentence aloud. If it names a vendor, use the vendor's exact spelling; if it speaks generally, use lowercase "app store."

Examples & quick fixes: common wrong → right pairs

Wrong sentence first, then a corrected, ready-to-use rewrite. Use the "Right" sentence verbatim to fix your text quickly.

Wrong: I downloaded it from the AppStore yesterday.
Right: I downloaded it from the App Store yesterday.
Wrong: You can find that app on the Amazon App Store.
Right: You can find that app on the Amazon Appstore.
Work - Wrong: Please add the link to the AppStore listing in the release notes.Work -
Right: Please add the link to the App Store listing in the release notes.
Work - Wrong: Our analytics show installs from the Appstore channel.Work -
Right: Our analytics show installs from the Amazon Appstore channel.
School - Wrong: Find the iPad app in the appstore.School -
Right: Find the iPad app in the App Store.
School - Wrong: Cite the Appstore as your source for the Android app.School -
Right: Cite the Amazon Appstore as your source for the Android app.
Casual - Wrong: I bought it on appstore for my phone.Casual -
Right: I bought it on the App Store for my iPhone.
Casual - Wrong: Downloaded from amazon appstore, works fine.Casual -
Right: Downloaded from the Amazon Appstore; it works fine.
Casual - Wrong: AppStore keeps crashing on launch.Casual -
Right: The App Store keeps crashing on launch.

Rewrite help: three templates to fix sentences fast

Use these templates to restore brand accuracy and avoid awkward modifiers.

Template 1 - Place the brand after the noun: "[noun] on the App Store" → e.g., "the listing on the App Store."
Template 2 - Specify vendor then product: "available on the Amazon Appstore" → e.g., "available on the Amazon Appstore."
Template 3 - Generic reference: "available in app stores" → e.g., "available in major app stores" (lowercase for non-branded).

Rewrite example 1: "AppStore listing needs screenshots" → "The App Store listing needs screenshots."
Rewrite example 2: "amazon appstore dev console" → "the Amazon Appstore developer console"
Rewrite example 3: "distribute via AppStore and PlayStore" → "distribute via the App Store and Google Play."

Memory trick and quick rules to remember

A short mnemonic and a three-step checklist make the rule easy to recall.

Mnemonic: "Apple splits it, Amazon sticks it" (Apple = space, Amazon = attached).
Three-step checklist: 1) Is this Apple, Amazon, or generic? 2) Use the vendor's exact form or lowercase app store. 3) If it's modifying a noun awkwardly, rephrase so the brand follows the noun.

Similar mistakes to watch for

Writers often mix vendor names or use inconsistent spacing and capitalization. Treat each store name the way the vendor presents it.

Don't write "AppStore" for Apple - use "App Store."
Don't write "Amazon App Store" (with a space) - use "Amazon Appstore."
Check vendor branding for Google: use "Google Play" or "Google Play Store" as appropriate, mirroring the current brand form.

Wrong: AppStore (iOS) and PlayStore (Android)
Right: App Store (iOS) and Google Play (Android)

FAQ

Is it "AppStore" or "App Store"?

For Apple's marketplace, write "App Store" (two words). "AppStore" is incorrect for Apple.

Should I write "Amazon Appstore" or "Amazon App Store"?

Amazon's official spelling is "Amazon Appstore" (Appstore as one word). Avoid inserting a space.

Can I use lowercase "app store"?

Yes. Use lowercase "app store" for generic references. Use the vendor's branded form for a specific marketplace.

Is hyphenation ever correct (App-Store)?

Prefer rephrasing to avoid hyphenating brand names. Instead of "App-Store listing," write "listing on the App Store."

How do I cite the App Store or Amazon Appstore in academic work?

Use the vendor's exact name (App Store or Amazon Appstore) and follow your chosen citation style for URLs or platform details.

Need a second pair of eyes?

If you're unsure about spacing or want a quick rewrite for an email, report, or assignment, paste the sentence into a grammar tool that respects brand spellings. A quick check keeps your copy professional-especially in release notes, citations, and press materials.