For iPhone · On the App Store
Measure your strike. Then improve it.
Film a kick. Strikr measures its speed and spin, traces its flight and charts both feet week by week.
A real kick, measured at 76.6 km/h47.6 mph on an iPhone. Play it, slow it down, swipe up for more.
Measuring kicks takes Strikr Pro: 7 days free for new subscribers on the yearly plan, then $19.99 a year in the US unless you cancel. Prices vary by country.
Left and right
Each foot gets its own numbers.
Stats puts your feet side by side: each foot's average and best, how much slower your weaker foot is, and both feet charted week by week.
In the example, the gap between the two lines closes from 21 km/h in week 1 to 13 in week 8.In the example, the gap between the two lines closes from 13 mph in week 1 to 8 in week 8.
Pick one foot and the whole Stats page counts only its kicks.
Strikr reads which foot struck the ball from your feet at the strike. A tap on the boots changes it.
Left and right
Your left foot is 24% slower.
Weeks with at least 2 kicks with that foot. How Strikr measures speed has changed between versions, so compare nearby weeks.
Speed
Records, the shot map, Form, trends and Spin count only left-footed kicks too.
Speed
Records, the shot map, Form, trends and Spin count only right-footed kicks too.
Progress
Know if practice is working.
Every kick lands in Stats. Kick a few times a week and Strikr charts your speed week by week.
Week by week
61 → 6938 → 43km/hmphAverage speed, week 1 to week 8
Example figures:
- Fastest
- 75 km/h47 mph
- Kicks
- 32
- Weeks in a row
- 8
Weeks with at least 2 kicks. How Strikr measures speed has changed between versions, so compare nearby weeks.
Personal records
Your fastest kick and your most spin. Tap either to watch it again.
Form
Your last 10 kicks against the 10 before.
Consistency
How much your last 10 kicks vary.
Weeks in a row
Your streak, and your best run.
By category
Name what you're working on and compare it, average against average.
Where your shots go
How often you're on target, and your most common spot.
Every kick
More than a speed.
Film in Strikr or import up to three clips from Photos. Strikr measures each kick and draws its flight, all on your iPhone.
Speed
How fast the ball left your foot.
Flight
Traced over your replay, with its height and distance.
Spin
In rpm, from slow-motion clips of a ball with clear markings.
Which foot
Read from your feet at the strike. Tap the boots to change it.
Where it went
In, wide, over or off the woodwork. Strikr places it when it can tell.
A clip to share
Your kick with its trace, speed and spin, ready to post.
Made for kicks from a still ball: set pieces, penalty kicks and shooting drills.
Practice
Two kicks a week puts you on the chart.
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1
Film from a still ball
Set the ball down and strike it from the same spot each session, with you in the shot.
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2
A few kicks, every week
Two kicks in a week make a point on your chart. Two such weeks make a line.
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3
Change one thing at a time
File kicks under a category you name, like Plant foot closer, and compare them in Stats.
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4
Set a number for the week
Pick a weekly goal. Home's ring counts your kicks, and your streak counts the weeks.
Import later if you like: each kick lands in the week it was filmed.
Privacy
Your kicks stay on your phone.
No account, no server of its own, nothing to sell.
- Your video stays put. Every frame is analyzed on the phone.
- Anonymous usage counts, off in Settings. Never your videos, your name or where you filmed, and a kick's speed only as a 20 km/h range.
- Location stays in your file. It's read from the video's own tag and never sent anywhere.
- Delete the app and it all goes. Clips you film in Strikr are also saved to your Photos, if you allow it.
Strikr Pro
Strikr Pro is the whole app.
Measuring a kick takes Pro: every kick measured and traced, and every chart on this page. The kicks you save stay yours, subscribed or not.
Every kick
- Speed, and the foot that struck it
- Spin, from slow-motion clips of a ball with clear markings
- The flight traced, with height and distance
- Where it went in the goal
- Clips to share
Your progress, over time
- Your trend, form and consistency
- Left foot against right, week by week
- Stats for one foot at a time
- Your shot map
$19.99 a year in the US, starting with 7 days free for new subscribers · $5.99 a month. Prices vary by country.
Cancel at least 24 hours before the 7 free days end and you won't be charged. Otherwise the yearly price is charged to your Apple Account, and the plan renews yearly until you cancel.
Questions, answered.
Can my iPhone measure how fast I kick a soccer ball?
Yes. Film the kick in Strikr, or import a clip from Photos, and Strikr measures how fast the ball left your foot, in km/h or mph. It needs no extra equipment and no sensor in the ball: everything is worked out from the video, on the phone.
Can an app measure a soccer ball's spin from video?
Strikr does, in rpm, from a slow-motion clip of a ball with clear markings: it follows the markings as the ball turns. A plain ball, or one too small or blurred in the frame, can't be read, and Strikr says so instead of guessing.
How can I check my shot power?
Measure your shot speed. Film a kick from a still ball with your iPhone held steady, and Strikr gives you its speed, spin, height and distance. Kick a few times a week and it charts your speed, foot by foot, so you can see whether it's going up.
How is the speed worked out?
From the ball itself. A size-5 ball is 22 cm across, so its size in each frame gives the distance, and the clip's own timestamps give the time. When the footage isn't good enough to follow the ball, Strikr says so rather than guessing.
Does it work on match footage?
It's made for kicks from a still ball: set pieces, penalty kicks and shooting drills. Strikr takes its scale from the ball at rest, so a rolling ball or a phone that pans to follow it won't measure well.
How many kicks before my trends show up?
Records show from your first kick. Consistency needs 4 kicks, Form 8, and Week by week two weeks with at least 2 kicks each. How Strikr measures speed has changed between versions, so compare nearby weeks.
Will Strikr teach me technique?
No. Strikr doesn't tell you what to change. It shows you what happened when you did.
How do the weekly goal and streak work?
Pick a goal from 1 to 100 kicks a week. Home's ring counts every kick Strikr measures, on the day you filmed it, and weeks start on Monday. Your streak counts the weeks in a row with at least one kick, and your best run stays on record.
What does spin need?
Slow-motion footage of a ball with clear markings, filmed close and in daylight. Film in Strikr, or import Slo-mo clips with access to your photo library, so Strikr gets the original rather than a slowed copy. When it can't read the spin, it says so.
How does Strikr know which foot I kicked with?
It watches your feet just before the strike: your planted foot has stopped beside the ball, so the foot still moving is the one that kicked. If it can't see your feet, it goes with your usual foot from Settings. Tap the boots on a kick to change it.
When will I see my two feet compared?
As soon as each foot has a kick. The line saying how much slower your weaker foot is needs four kicks with each foot, and the weekly chart needs two weeks with at least two kicks with each foot.
I'm left-footed. Does that matter?
No. Strikr reads either foot the same way, and every card and chart works the same whichever one is stronger.
Which iPhones does it work on?
Any iPhone running iOS 17 or later. Newer iPhones finish sooner.
What does it cost?
Measuring kicks takes Strikr Pro: $19.99 a year in the US, starting with 7 days free for new subscribers, or $5.99 a month. Prices vary by country. Cancel at least 24 hours before the 7 free days end and you won't be charged. If you stop subscribing, the kicks you've saved stay yours.
Got a code?
Redeem it in Strikr under Settings → Strikr Pro → Redeem a code, or from the subscription screen.
Is there an Android version?
Not yet. Strikr is on iPhone for now.
Support
Getting a good measurement.
Start from a still ball
Let the ball settle before you strike it. Strikr takes its scale from the ball at rest.
Film the whole flight
Keep the ball in frame from the strike on, with the phone steady and level: the level line turns yellow when it is. No tripod? Prop the phone on a bag.
Film against something, not sky
The tracker follows the ball best against trees, a fence or the net. Across open sky it can lose it.
Keep the ball big in the frame
Film closer, or zoom in. A ball a few pixels across can't be followed.
Keep yourself in the shot
Strikr reads which foot struck the ball from your feet, so keep them in frame as you strike.
Film every session the same way
Same spot, same distance. Your weeks are easiest to compare when the footage is alike.
Something wrong?
Email support@kanikulabs.com. For a speed problem, attach a diagnostics record (Settings → Export debug JSON).
Start with one kick.
On the App Store for iPhone. The yearly plan starts with 7 days free for new subscribers, then $19.99 a year in the US unless you cancel.
Download on the App Store