Comparison

Under Armour vs KeyStacker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Under Armour

Shop a wide range of athletic clothing, shoes, and gear designed for all fitness levels. Discover exclusive collections, receive personalized recommendations, and enjoy benefits like free shipping and rewards.

Highlights
  • Shop athletic clothing, shoes, and gear
  • Exclusive collections (Curry Brand, Project Rock)
  • New drop alerts
  • Personalized product recommendations
  • Free shipping, returns, and exchanges
  • UA Rewards program with points and exclusive benefits
  • Streamlined checkout with multiple payment options
Features
Read full description

Take performance to the next level with the UA App. Shop from our collection of shoes, clothes, and gear designed for athletes of all fitness levels. Whether you're looking to stay cool while training for your next half-marathon, practicing with your team, or hiking outdoors, get all your workout essentials online from Under Armour. In the UA App, you can find: * New drop alerts that notify you when we release our latest sneakers, clothing, and accessories. * Tailored product recommendations to support your training and fitness goals. * Free shipping, returns, and exchanges. * Member-exclusive benefits and rewards when you join Armour Access. UNLOCK THE BEST OF UA WITH ARMOUR ACCESS. Get First Dibs on Gear & Events, cut the line with early access to product drops and ticketed events. Access Exclusive Sweepstakes, enter for a chance to win access to bucket-list-caliber moments. Earn Points To Level Up, For every $1 you spend, we award 5 points you can swap for perks. GET THE BEST GEAR FOR YOUR GAME-PICKED FOR YOU. Whether you play basketball or baseball, or are a runner in training, get personalized recommendations for footwear and apparel so you can crush your next workout. We designed our performance apparel to withstand your training while keeping you comfortable and locked-in. This is go-to athletic gear-for men, women, boys, and girls-all right here. We made online shopping easy for anyone on the go. CHECKOUT QUICKLY & EASILY. With a streamlined checkout process, the UA Shop App ensures a fast and hassle-free shopping experience. Browse through our extensive collection of performance apparel for every sport, find the right fit and style for you, and make secure payments with just a few taps. You can check out with Apple Pay, Klarna, PayPal, or your UA Account-we made it fast and convenient so that you can focus on putting in the work. FIND GIFTS FOR EVERY ATHLETE. Whether the athlete in your life competes in soccer, football, golf, or running, Under Armour makes game-changing performance gear that will withstand training through any season. Shop from our collections and get the perfect gift for that top performer in your life. Check out our athlete's top picks or quickly shop by sport, gender, or price. With free shipping and easy, free returns and exchanges it's no sweat. If you can't decide what to get, grab a UA Gift Card-the gift that's always a hit. CONNECT WITH UNDER ARMOUR EVENTS NEAR YOU. Be the first to know about athlete appearances, UA events, in-store offers, and more when you use the UA Shop App. Join us at an Under Armour Brand House or Factory House, and experience UA online, in-store, and beyond. Download now and start shopping the best performance gear on the plane

About

KeyStacker

Features
Read full description

Stack your cards, ditch the clutter. Key Stacker turns your phone into a single, tidy wallet for every loyalty card, membership, gym pass, and library card you carry. Snap the barcode once and it's ready whenever you need it — no account, no sign-up, no internet Add cards in seconds Point your camera at any barcode or QR code and Key Stacker captures instantly. Supports all the common formats — QR, PDF417, Aztec, Data Code 128/39/93, Codabar, EAN, UPC, and more — so if a store can scan it, you can stack it. Built to scan Open a card and Key Stacker jumps to full brightness and shows the code big and crisp. Pinch to resize it, rotate wide barcodes to fill the screen, let any reader pick it up on the first try. Each card remembers your preferred size. Stay organized Tag your cards, mark favorites, and search or filter to find the right fast. Add notes, pick an accent color, and snap photos of the physical card for reference. Yours and private Everything lives on your device. Lock the app behind Face ID, hide it from the app switcher, and back up or restore your whole wallet with a single shareable file. Key Features - Store unlimited loyalty, rewards, and membership cards - Scan QR codes and barcodes in 10+ formats - Works 100% offline — no account, no signup - Local-only storage with Face ID lock - Full-screen mode with brightness boost for reliable scanning - Tags, favorites, and notes - Backup and restore No ads. Just your cards, ready when you are. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://gist.github.com/dinitiatives/d818654ad0c96fa9d76358da7731e115#file-key-stacker-privacy-md

Screenshots

Under Armour4 screens
KeyStacker4 screens

Verdict

The call

The clearest difference is in-app purchases: Under Armour at none against KeyStacker's 2. KeyStacker's advantage is update cadence (every 4 days vs fortnightly) and iOS requirement (16.4 vs 18.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KeyStacker sells 2 in-app purchases, starting at $2.99 per month. Under Armour asks for nothing beyond the download.

UpkeepUpdate frequency

Under Armour ships an update fortnightly, KeyStacker every 4 days. The most recent releases landed on October 16, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Under Armour versus KeyStacker: the parameters behind the verdict, then further details
ParameterUnder ArmourKeyStacker
PriceFreeFree
Rating4.8 (77K ratings) — better—
Positive reviews82.0% of reviews—
Number of ratings77K — better—
Update frequencyFortnightlyEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.4 — better
Further details — not scored
Size132 MB52 MB
Age rating4+4+
DeveloperUnder Armour, Inc.Didactic Initiatives LLC

Bugs and requests

Under Armour

Reported bugs

4 issues
  • App crashing or freezing
  • Incorrect product information or pricing
  • Issues with login and account management
  • Syncing problems between app and website

Requested features

4 requests
  • Ability to edit personal information within the app
  • Option to track order status and history
  • Improved product recommendations and outfit suggestions
  • Better integration between app and website experience

KeyStacker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Under Armour

No in-app purchases

2 purchases

KeyStacker

Subscriptions2
  • Key Stacker Pro (Monthly)$2.991 Month
  • Key Stacker Pro (Annual)7 Days trial$24.991 Year

Questions

Is Under Armour free?
Under Armour is free to download, with no in-app purchases.
Is KeyStacker free?
KeyStacker is free to download, with in-app purchases available.
Do Under Armour or KeyStacker have ads?
Neither Under Armour nor KeyStacker shows ads.
Which is updated more often, Under Armour or KeyStacker?
Under Armour ships an update fortnightly, and KeyStacker every 4 days. Most recently, Under Armour was updated on October 16, 2026 and KeyStacker on September 30, 2026.

Other comparisons