For school, club and pro teamsAthlete monitoring and performance app
Sports science that backs your team.
Readiness and training, visualized in numbers. Athletes see where they are and how far they are from their next goal — so they learn to think for themselves and grow on their own. And the whole team sees the same numbers on one screen.
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
Athletes who think and act for themselves. A whole team that looks at the same numbers and talks it through. Day by day, that is how a team reaches the next level — and ATHCON brings it to teams with a trainer and teams without one.
Readiness and training become numbers you can see, every day.
Coaches, trainers and athletes share a common language: what the numbers mean and what the goals are. So you can act early on injury prevention and plan with purpose.
Athletes know where they are and what comes next, and act on their own — so coaching continues even when you're not there.
FeaturesPractice notesColumns
As of October 2026
Three core features help your team improve with data. Four more take care of running the team, from schedules to messages. 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 only spot the tired athlete right before the game — or after the injury.
See how the flags workAthlete 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: Everyone lifts the same weight — too heavy for some, too light for others.
Periodized program · Phase 2, week 3
Back squat
Athlete A
Est. 1RM
105.0kg
Next at 80% 1RM
84kg
Performance
When this sounds familiar: You run fitness tests, but the results sit untouched in a spreadsheet.
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: Messages with athletes are scattered across personal chats and hard to find later.
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.
Your athletes can start checking in today.
Set up in minutes. No credit card required.
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
Even without a trainer beside your team every day, ATHCON supports the team's daily routine the way a trainer would.
Each athlete is compared with their own last 28 days, and anyone off their normal is flagged as caution or alert.
Estimated 1RM is calculated automatically from each set's load and reps, so %1RM shows the right weight for every athlete.
Log fitness test results and see each athlete's change from last time and position within the team automatically.
Change the fee and the number of visits to match your team.
Cost estimate
Starting values are examples, not market rates.
Visiting trainer (per year)
$0
ATHCON (up to 30, per year)
$0
Annual difference
$0
A trainer visiting 4 times a month costs $7,200 a year. ATHCON is $319 a year — a difference of $6,881.
ATHCON is not a substitute for a qualified trainer. Use it as a first step before bringing one in, and to keep an eye on daily changes on the days a trainer isn't there.
* An estimate based on the values you enter. Trainer fees vary with the work and the region.
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.