For athletic trainers and S&C coachesAthlete monitoring and performance app
Sports science that backs your team.
Readiness and training for every team you work with, visualized in numbers. Switch teams from the top of the screen with a single account. Less collation means more time to coach.
Spreadsheet work worth $5,000 a year* drops to zero.
From about $0.55 per athlete/month (from about $22 per team/month)**
Opening to teams outside Japan soon. No credit card required.
* Based on 4 hours a week × 52 weeks at $25/hour of data collation ($5,200).
** Per athlete: the 100-member plan ($659/year) ÷ 12 months ÷ 100. Per team: the 20-member plan ($269/year) ÷ 12 months.
Mon, Oct 5Athlete B
Today's check-in
Mon, Oct 5
Your team today
Checked in/ 20
Team A
Check in with
17 others normal or great
Athlete BCaution
Fatigue is above their normal range
Let the app handle collation and reporting so you can focus on coaching. Take on more teams, and keep coaching remotely on the days you're not there. ATHCON widens the circle of teams your expertise can reach.
Readiness and training for every team you work with become numbers the moment athletes check in, giving coaches, trainers and athletes a common language for what the numbers and goals mean.
FeaturesReadiness monitoringPerformance
No more collecting forms, typing them up, collating and sharing — that time goes back to coaching.
Switch teams at the top of the screen and share programs. Athletes act on their own, so coaching continues on the days you're away.
FeaturesTrainingPractice notes
As of October 2026
Three core features help the teams you work with improve with data. Four more take care of running each team. Every team uses the same screens, switched from the top of the screen. Select a feature to see the details.
Readiness monitoring
Athlete B
CautionCheck-in, Mon Oct 5
Sleep
5.8h
Fatigue
6.9
Soreness
3
Fatigue is above this athlete's normal range
Readiness monitoring
When this sounds familiar: You have no idea how athletes are doing on the days you don't visit.
See how team switching worksAthlete B
CautionCheck-in, Mon Oct 5
Sleep
5.8h
Fatigue
6.9
Soreness
3
Fatigue is above this athlete's normal range
Training
When this sounds familiar: You rebuild the program for every team and can't keep the quality consistent.
See program sharingPeriodized program · Phase 2, week 3
Back squat
Athlete A
Est. 1RM
105.0kg
Next at 80% 1RM
84kg
Performance
When this sounds familiar: After every test, you compile each team's results and compare them with past records.
30 m sprint
Athlete A
4.38s
0.12 s faster than last time
Team rank
3rd
of 23
Speed
A
Schedule
When this sounds familiar: You answer "what time tomorrow?" again and again.
Team A
Oct 6–12
M
6
T
7
W
8
T
9
F
10
S
11
S
12
Messages
When this sounds familiar: Athletes from each team reach you on a different chat app.
Athlete A
Messages with your trainer
My right calf has felt a bit tight since yesterday's practice.
Thanks for telling me. Let's cut the sprints today — show me before practice.
Got it, thank you.
Practice notes
When this sounds familiar: There's never time to ask each athlete what they took from practice.
Practice note
Athlete B · Sun, Oct 5
Coach
Great catch. Let's check your first step together next practice.
Columns
When this sounds familiar: You can't explain the reason behind every exercise, every time.
Conditioning
Your body gets stronger while you sleep
Read
Training
Should you rest when your muscles are sore?
Read
Built around your team: Create your own fitness test items and readiness items to fit your team.
See every athlete's readiness, wherever they train.
Sign-ups for teams outside Japan are opening soon.
Wellness on paper or in chat apps, training in notebooks, test results in spreadsheets. The team never sees the same numbers, and nothing keeps it going. Most teams hit the same wall.
Collect paper forms and messages, copy them into a spreadsheet, build charts, share them. That time belongs to team practice.
You spot the fatigued athlete right before the game — or after the injury. Nobody has time to read every athlete's numbers every day.
Paper logs get skipped, and you cannot compare with the same point last season. Your data never becomes evidence for your coaching.
Head coach, coaches and athletes each look at different notebooks and screens. Shared understanding never builds, and goals never line up.
Manual work every week
4 hours × 52 weeks = 208 hours a year
With ATHCON, it is all done automatically the moment athletes check in.
0 minutes of collation
Collecting check-ins, typing them into spreadsheets, collating, sharing — that time belongs to coaching. Run the numbers for yourself.
Annual cost estimate
Manual labor / year
$0
ATHCON / year
$0
You save / year
$0
4 h × 52 weeks × $25 − ATHCON annual plan
Athletes log data every day and you can review it from anywhere. Even if you visit once a week, you know how the other six days went — so you can take on teams in other cities.
Remote coaching revenue estimate
* An estimate based on the values you enter. Actual fees and terms vary by coach and team.
Periodized programs can be shared between teams, and the sessions you use most can be saved as templates — so every team gets the same quality of training.
A program reaches your athletes as soon as you create it — no files to send, no links to re-share.
Each athlete's training log is kept on its own, and athletes can edit their own entries. Unlike a shared spreadsheet, one person's edit never shifts the table out of line, and you never have to clean it up again.
Estimated 1RM is calculated automatically from each set's load and reps, so the same program gives every athlete the right load.
Periodized program · Phase 2, week 3
Back squat
Athlete A
Est. 1RM
105.0kg
Next at 80% 1RM
84kg
Switch teams by picking one at the top of the screen. Every team works the same way on the same screens, so more teams never means more confusion.
Readiness, training, fitness tests — pick another team and every screen switches to that team.
If one team tracks boys and girls separately, you can switch the view between boys, girls and everyone.
Team
Team A today
Checked in18 / 20
1Athlete
Athletes tap sliders for sleep, fatigue, soreness and more. Nothing to install — it runs in the browser.
Mon, Oct 5
Today's check-in
2App
Not a team-wide cut-off: ATHCON measures how far each value is from that athlete's own 28-day baseline and color-codes it as great, normal, caution or alert.
Athlete B · Fatigue
Deviation from baseline
Caution
Fatigue has been above this athlete's normal for 2 days in a row.
3Coach
No need to read every number. Flagged athletes are listed first, so you know exactly who to talk to — even from a distance.
U-18 · 41 athletes
Athletes to check in with
Mon, Oct 5
Today's check-in
We do not build on hunches. Our staff, with experience coaching everyone from youth athletes to pros, turn research findings into product decisions.
What the research found
Predicting injuries from a single load ratio (ACWR) is risky: the ratio carries mathematical distortions, and the choice of metrics and time windows makes false positives likely.
In ATHCON
Instead of one ratio, ATHCON flags each athlete's sleep, fatigue and soreness against their own baseline over the previous 28 days.
Impellizzeri FM, et al. Training Load and Its Role in Injury Prevention, Part 2. J Athl Train. 2020;55(9):893-901.doi:10.4085/1062-6050-501-19What the research found
The countermovement jump (CMJ) can track fatigue and supercompensation. In a meta-analysis of 151 studies and 531 effect sizes, the average value detected fatigue more sensitively than the best value.
In ATHCON
Log jump and other test results by date, then view each athlete's trend and team comparisons in charts.
Claudino JG, et al. The countermovement jump to monitor neuromuscular status: A meta-analysis. J Sci Med Sport. 2017;20(4):397-402.doi:10.1016/j.jsams.2016.08.011What the research found
Stopping sets at 20% velocity loss meant about 40% fewer total reps than going to 40% loss — yet jump performance improved more (+9.5% vs +3.5%).
In ATHCON
Estimated 1RM is calculated automatically from each set's load and reps, so you can prescribe by %1RM and avoid chasing volume for its own sake.
Pareja-Blanco F, et al. Effects of velocity loss during resistance training. Scand J Med Sci Sports. 2017;27(7):724-735.doi:10.1111/sms.12678What the research found
A systematic review of 248 studies and 9,440 participants on the Yo-Yo tests. For sub-elite soccer players, a YYIR1 difference of roughly 92–138 m is considered a meaningful change.
In ATHCON
Store fitness test results, including the Yo-Yo test, and see each athlete's change from last time and position within the team automatically.
Schmitz B, et al. The Yo-Yo Intermittent Tests: A Systematic Review and Structured Compendium. Front Physiol. 2018;9:870.doi:10.3389/fphys.2018.00870An athlete's readiness data is personal. Here is how ATHCON handles it.
Read the privacy policy (Japanese)Readiness data an athlete enters is visible only to the coaches, staff and others the team has given access. Athletes see only their own data — never another athlete's. Access to the admin screens is restricted too.
All communication with the app is encrypted (HTTPS).
Passwords are stored in a form that can't be turned back into the original (hashed), so not even we know them.
Payments are processed by Stripe; we never store credit card numbers.
Personal data is stored on cloud services run by US companies (Vercel and MongoDB). AI providers are used on terms that they don't train their own AI models on the data entered.
No feature tiers — every plan includes everything. Try it free for 30 days.
From about $0.55 per athlete/month (from about $22 per team/month)
* Per athlete: the 100-member plan ($659/year) ÷ 12 months ÷ 100. Per team: the 20-member plan ($269/year) ÷ 12 months.
Members (including coaches and staff)
Per year (USD)
$269
About $22 a month · $1.12 per athlete per month
More than 100 members or several teams? Contact us.
Every plan includes
Plans renew annually; cancel by contacting us at least one month before renewal. The free trial requires no credit card and never converts to a paid plan automatically. Payment is by credit card (invoice/bank transfer is available for teams in Japan). By signing up you agree to our Terms of Service and Privacy Policy (written in Japanese; the Japanese version prevails).
2,000+
Registered athletes
“Managing training programs has become dramatically more efficient.”
“Being able to see all the wellness data athletes enter in one list is great.”
“Athletes can check their fitness test results right away.”
“Tracking how junior athletes develop over time is another big plus.”
Your team could be next.
Questions about getting started? Just ask us.
Anything else? Email us — we are happy to help.
Yes — 30 days, every feature, no credit card. Sign-ups for teams outside Japan are opening soon. Request early access and we will set up your team.
We are turning the app our coaches always wished they had into reality — together with researchers and data engineers.
CEO
Hidetoshi Oshiro
Former S&C coach, Ryukyu Golden Kings (2007–2012); former training coach, Japan Institute of Sports Sciences (2013–2016)
Executive Director
Ko Chu
Former researcher, Japan Institute of Sports Sciences; JOC coaching staff
Data Science Director
Kenneth Shinzato Simonds
Data engineering experience at Meta and Tapjoy
Try every feature free for 30 days. No credit card, a few minutes to set up, and your athletes can start checking in the same day.