Fencing
Foil · épée · sabre
For individual-sport athletes
The journal you keep on every opponent — and on yourself.
Keep what you learned from each opponent, match and training session. Find it again before your next meeting, on your phone or computer.
See what's free forever- Free forever — the whole journal
- Your notes live on your storage, not our servers
- No streaks. No badges. No noise.
Screens show fictional demo records.
Between one meeting and the next
Record it. Find it. Try something next time.
- 01
Record the match
Add the result and a few notes about what happened.
- 02
Mark the situation
Put a pin on your sport's drawing and explain the action.
- 03
Return before you compete
Reread your notes about the opponent and choose an adjustment to test.
Seventeen sports supported
Drawn for every duel.
Choose from 17 sports, each with a spatial drawing, profile fields and tags. Some combat sports also provide a separate list of named positions. Kickboxing/Muay Thai and boxing share a ring drawing, and BJJ, judo and kyokushin karate share a mat drawing.
Table tennis
Singles or doubles
Badminton
Singles court
Tennis
Singles court
Padel
Doubles · walled court
Squash
Singles court
Judo
Tachi-waza + ne-waza
Positions8
- Standing — gripping
- Kuzushi (breaking balance)
- Ne-waza — kesa-gatame
- Ne-waza — yoko-shiho-gatame
- Ne-waza — kami-shiho-gatame
- Ne-waza — tate-shiho-gatame
- Ne-waza — ura-gatame
- Ne-waza — turtle defense
BJJ
Position-driven
Positions11
- Standing
- Closed guard
- Open guard
- Half guard
- Side control
- Mount
- Back
- North-south
- Turtle
- Leg entanglement (ashi garami / 50/50)
- Scramble
Wrestling
Folkstyle · freestyle · Greco-Roman
Positions10
- Neutral
- Tie-up
- Underhook
- Front headlock
- Single leg
- Double leg
- Top / par terre
- Bottom / referee's position
- Scramble
- Edge / zone
Kendo
Shiai-jō · sanbon-shōbu
Kickboxing/Muay Thai
Ring
Boxing
Ring · 3–12 rounds
MMA
Cage · standing + ground
Positions13
- Standing — striking
- Clinch
- Cage clinch
- Sprawl / front headlock
- Guard — top
- Guard — bottom
- Half guard
- Side control
- Mount
- Back control
- Scramble
- Ground — top (general)
- Ground — bottom (general)
Taekwondo
WT & ITF sparring
Karate
Shōbu ippon · WKF kumite
Kyokushin Karate
Knockdown karate
Ju-jitsu
JJIF fighting system
Positions10
- Part 1 — striking
- Part 2 — throws & takedowns
- Guard
- Half guard
- Side control
- Mount
- Back control
- Osaekomi (hold-down)
- Turtle
- Scramble
Multi-sport athletes: switch sports freely, keep separate books, on every tier — including Free.
The book
Everything a scouting book should hold. Free, forever.
Free includes opponents, matches, training, events, pins, sync, backups and exports. Paid tiers add analytics, training plans and optional AI tools.
Opponents
A living profile for everyone you face — structured fields, free-form observations, full match history.
Matches
Score, score by period, and the three questions that matter — what worked, what didn't, what to remember.
Pins on the surface
Mark where it happened on your sport's diagram. Choose worked, didn't work, danger or tendency, and add a note to explain the situation.
Photos & video
Attach photos and video as you log the match, then link a pin to the exact second in a video file. No app-imposed count limit — your device and storage capacity still apply.
Events
Keep an event's expected opponents, preparation and results together.
Training journal
Record sessions, focus and effort alongside your opponent notes, so you can review training and competition together.
Your own tags and categories
Action tags, style tags, training categories and your sport's profile fields all come set up for you. Add the options you actually use, hide the ones you don't, and the book ends up shaped the way you work.
Exports for your coach
Export an opponent profile, a selection of records or the whole journal to PDF or Word, at no extra cost.
Offline & synced
Read locally saved records and write notes at a venue with no signal. Reconnect and open the app to sync through your own storage.
Your storage, your records
We do not keep a server copy of your journal.
Your journal stays on your device and connected storage. OpponentBook keeps account, subscription and usage information, plus a minimal index and settings. Requested AI actions send the relevant content for processing; this is separate from journal storage.
Journal content in your storage
- Your observations about opponents
- Match reflections and scores
- Training entries
- Photos, video
- Whether you reviewed before a match
Service information we handle
- Your email and login method
- Your subscription tier
- An index and settings, including IDs, dates and sport tags
Optional end-to-end encryption also protects journal records from your storage provider. Photos and video are outside this encryption.
How your data is handled →When you want more than memory
AI that reads your book — only when you ask.
Request an opponent summary, competition brief or analysis of your notes. The content needed for that action passes through OpponentBook to an external AI provider. AI does not review your journal in the background.
Premium
One-tap opponent summaries
Bring the notes about one opponent into a short summary to check before you compete.
Pro
Pre-competition briefs
Create a competition brief from your notes about the opponents you expect to face.
Pro
Patterns across your book
Explore AI suggestions about opponent styles, recurring problems and changes in your game. Tick a box and the evolution analysis also reads your training journal: it quotes your own notes, sets your training beside your results against each opponent style, and offers one thing to try. It states a gap, never a cause.
AI results you save stay in your storage, even if you cancel a paid plan.
Competition brief Pro
Screens show fictional demo records.
The notebook
Reading for the train home.
Judo grip fighting: read an opponent's kumi-kata and plan the next contest
Judo grip fighting notes: record an opponent's stance, first grip, attack side and ne-waza habits, then choose two things to test at the next contest.
Padel tactics: how to read opponents and plan the rematch
Practical padel tactics and match notes: watch the lob, the reply and both partners' movements, then agree what to try against the same pair next time.
Tennis opponent analysis: notes to test at the rematch
Tennis opponent analysis for club singles: record serve and return, rally patterns and your own errors, then test two ideas at the rematch.
Start with one opponent. Build from there.
A name and one useful observation are enough to begin. Add the rest when you have it.
Sign up freeFree forever · No card required · Works offline