King vs Flip for Function
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
King
This app provides a quick and objective sideline concussion screening test for athletes. It helps identify potential concussions by assessing eye movements, attention, and concentration through a simple number-reading exercise. Requires an existing King-Devick Online account.
- Objective sideline concussion screening
- Assess eye movements and attention
- Administer baseline and post-injury tests
- Works offline
- Suitable for ages 5+
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This app is intended ONLY for users with an existing King-Devick Online account. The King-Devick Concussion Screening Test is an objective, remove-from-play sideline concussion screening test which can be administered by parents, coaches, athletic trainers or medical professionals in minutes. Peer reviewed published research has shown that the King-Devick Test is an accurate and reliable method to help identify athletes with concussion on the sidelines. It has particular relevance to sports such as football, hockey, soccer, and basketball in addition to all other contact or collision activities on the field or at home. The test involves reading aloud a series of single digit numbers from left to right on three test cards. The King-Devick can detect impairment of eye movements, attention, language, concentration and other areas which correlate with concussion. How does King-Devick Test work? -King-Devick Test account holders get unlimited concussion screening per athlete per year. -With the King-Devick Test App, you can administer baseline and post-injury assessments even when WiFi is not available. -All athletes establish a pre-season or pre-injury baseline test score annually. -Concussion screening for athletes as young as 5 years old.
Flip for Function
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WELCOME TO FLIP FOR FUNCTION in Nashville, TN! The Flip for Function app allows you to manage your account with ease, register for classes, parties, and special events. You'll also receive important notifications about class changes, closings, registration openings, special announcements, and upcoming events. The Flip for Function app is an easy-to-use, on-the-go way to access everything Flip for Function has to offer right from your smartphone. We believe all children should have access to sports and recreational activities where they feel successful. Through gymnastics, and other adaptive sports, children develop skills to thrive in and outside of the gym, so they may live full and meaningful lives. We are experienced problem-solvers and relationship-builders on a mission to make recreational activities accessible to all children, no matter their disability. We inspire self-confidence in children through occupational therapy and adaptive gymnastics. Our therapists and instructors give children appropriately tailored challenges, allowing them to experience a sense of accomplishment, pride, and belonging, as they discover their previously untapped potential. We are creating a space for your child to belong, have fun and learn how to function in the world. Though our tiered programming with varying levels of support, we actively cultivate an inclusive environment that ensures every child, no matter their diagnosis or disability, can access and enjoy the advantages of fitness and athletics.
Screenshots
Verdict
The clearest difference is update cadence: King at every 2 months against Flip for Function's every 13 months. King also leads on iOS requirement (9.0 vs 15.0). Flip for Function's advantage is device support (3 vs 1). On price, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
King ships an update every 2 months, Flip for Function every 13 months. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.
| Parameter | King | Flip for Function |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 243 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | King-Devick Test, LLC | Flip for Function, PLLC |
In-app purchases
King
No in-app purchases
Flip for Function
No in-app purchases
Questions
Is King free?
Is Flip for Function free?
Do King or Flip for Function have ads?
Which is updated more often, King or Flip for Function?
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