Comparison

USTA Flex vs Korta

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

Head to head
About

USTA Flex

Find and play competitive tennis matches at your level on courts near you. Arrange games flexibly around your schedule and meet new players. Track your progress and improve your game with level-based singles or doubles matches.

Highlights
  • Find level-based tennis matches
  • Flexible scheduling with in-app chat
  • Singles and doubles competition
  • Track match history and progress
  • Utilizes ITF World Tennis Number for matchmaking
  • Organize and enter leagues
Features
Read full description

With USTA Flex, you can play tennis at your level on a court near you, whenever it suits you. Get on the court and enjoy friendly, competitive singles or doubles matches. Whatever your level – beginner or advanced – you will play exciting matches, meet new people and improve your game. Flex leagues are taking place all across the US and all year round for adults over the age of 18. Leagues take place in a round-robin or ladder 2.0 format, and a season generally runs for 8 to 12 weeks. You can arrange matches whenever you want – so it’s ideal if you’re looking to compete around your busy lifestyle. Why you should join More tennis: Play 5-7 level-based matches while making new tennis friends Ultimate flexibility: With our in-app chat, scheduling matches around your life has never been easier. Play when you want, where you want Track your progress: Every match is an opportunity to improve your game and improve your WTN rating Features of the USTA Flex app - Find all you need in one place – entering leagues, setting up matches, inputting scores and match history - In-app chat – easily schedule matches with your opponents with individual and group chats - More to come: Set up your own flex leagues and join local events and communities to get the most out of your tennis Not sure of your level of play? No problem – we’ll find the right group for you using your ITF World Tennis Number, so you play opponents at the right level for you. What’s the ITF World Tennis Number? The ITF World Tennis Number is a rating system for all tennis players across the world. It makes it easier for everyone who plays tennis in US to organize and play against opponents of a similar standard. • A worldwide rating system that ranges from 40 (beginner players) to 1 (pro players). • Has separate ratings for Singles and Doubles players • Uses a sophisticated algorithm to calculate your rating and updates it every time you compete • Counts sets and matches played, which means the more you compete, the more accurate your WTN will be Game on! Download the USTA Flex App today and enter a world where more tennis matches are just a tap away. Join our community of passionate players and discover the joy of playing tennis on your terms. Let’s make every match count with USTA Flex!

About

Korta

Connect with other tennis players to log matches, build a personal rating, and find new people to play with. Organize games, track your tennis history, and share your results.

Highlights
  • Find tennis players by level and location
  • Log singles and doubles match scores
  • Build a personalized Korta Score rating
  • Post and join available games
  • Group chat for organizing matches
  • Shareable match result cards
Read full description

Tennis is better with people. Korta is where recreational players log their matches, build a real rating, and find their next hit. FIND YOUR PEOPLE Search the player directory by level and location, or connect in person on the spot with your Korta Code. Message players directly or start a group chat to get a game on the calendar. LOG EVERY MATCH Singles or doubles, three-set marathons, sessions that got cut short. Log the score in a few taps and keep your whole tennis history in one place. BUILD YOUR KORTA SCORE Every match you log moves your Korta Score, a rating made for rec tennis. Watch it change over time and see how you stack up against the people you actually play. POST A HIT Looking to play? Post a hit and let players join, or set your lineup ahead of time so everyone knows who's on court. A FEED FOR YOUR TENNIS LIFE See who your friends are playing. Comment on the wins, the upsets, the three-hour battles. SHARE THE WIN Turn any match into a share card built for Instagram stories, iMessage, and the group chat. Whether you're new in town, getting back into the game, or chasing down a rival, Korta makes it easier to play more tennis. Download Korta and log your first match today.

Screenshots

USTA Flex4 screens
Korta4 screens

Verdict

The call

The clearest difference is ratings volume: USTA Flex at 777 against Korta's 1. USTA Flex also leads on iOS requirement (13.0 vs 17.0). Korta's advantage is update cadence (every 5 days vs every 3 weeks) and rating (5.0 vs 4.8). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Korta holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: USTA Flex has 777 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

USTA Flex ships an update every 3 weeks, Korta every 5 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
USTA Flex versus Korta: the parameters behind the verdict, then further details
ParameterUSTA FlexKorta
PriceFreeFree
Rating4.8 (777 ratings)5.0 (1 ratings) — better
Positive reviews39.3% of reviews—
Number of ratings777 — better1
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size133 MB58 MB
Age rating4+12+
DeveloperUSTAG & Z Holdings LLC

Bugs and requests

USTA Flex

Reported bugs

11 issues
  • App works when it wants
  • Constant notifications with no messages
  • Cannot toggle back to see schedule
  • WTN score not figured out
  • Unable to login
Show 6 more
  • Cannot sign in with Google SSO
  • Cannot post score
  • Error: could not load data from server
  • Scores could not be inputted
  • Bad at positioning and assignments for ladder matches
  • Trouble to login

Requested features

6 requests
  • Link match times to calendars
  • Calendar in the app
  • Display all scheduled matches
  • Input availability directly
  • Google SSO integration
Show 1 more
  • Match score editing controls

Korta

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

USTA Flex

No in-app purchases

None

Korta

No in-app purchases

Questions

Is USTA Flex free?
USTA Flex is free to download, with no in-app purchases.
Is Korta free?
Korta is free to download, with no in-app purchases.
Which has better reviews, USTA Flex or Korta?
Korta is rated higher. USTA Flex averages 4.8 out of 5 from 777 ratings, while Korta averages 5.0 from 1 ratings.
Do USTA Flex or Korta have ads?
Neither USTA Flex nor Korta shows ads.
Which is updated more often, USTA Flex or Korta?
USTA Flex ships an update every 3 weeks, and Korta every 5 days. Most recently, USTA Flex was updated on November 6, 2026 and Korta on October 31, 2026.

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