Stop Starting Over.
Start Getting Results.
Serkit is built around progressive overload. Your saved routine targets are ready when the workout opens. When recent sessions meet your rules, Serkit suggests what to lift next.
- Free forever, no card
- Works offline, no account
- Runs in your browser. Nothing to download
You Already Train Hard.
Serkit Makes Progressive Overload Effortless.
The Forgetter
You get under the bar and think... “was that 185 or 190 last week?” So you take the safe number. Six weeks of that and you have trained hard for nothing.
The Spreadsheet Keeper
Your log works, and you hate using it. Typing on a phone between sets, scrolling to find the right tab. And it still won’t tell you what you did on this variant, in this round.
Serkit handles the part you keep losing track of.
Most Apps Track Workouts.
Serkit Tracks Progress.
| What matters | Typical trackers | Spreadsheets | Serkit |
|---|---|---|---|
| Context-aware targets Each saved target belongs to its routine, variant, round and set | Per exercise, sometimes per routine | If you build it yourself | Routine + variant + round + set |
| Heavy and light day variants Same exercise, separate progress histories. Part of Pro | Usually separate routines | Manual | One routine, tracked apart |
| Train before you sign up No account, no email, no card | Signup first | Yes | Open it and go |
| Blocks, circuits and supersets Structure with its own rounds and rest, not a flat list | Varies | DIY | Built in |
| Offline without an account Gym basement, aeroplane mode, dead signal | Offline, but sign in first | Yes | Fully offline, no account |
| Your data, exportable One button, full JSON of everything you have logged | Varies, often paid | It's your file | Export and import, free |
| No feed, no streak guilt Nothing on the screen is trying to keep you on the screen | Social features | Yes | Training only |
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Context-aware targets
Each saved target belongs to its routine, variant, round and set
Serkit Routine + variant + round + set
- Typical trackers
- Per exercise, sometimes per routine
- Spreadsheets
- If you build it yourself
-
Heavy and light day variants
Same exercise, separate progress histories. Part of Pro
Serkit One routine, tracked apart
- Typical trackers
- Usually separate routines
- Spreadsheets
- Manual
-
Train before you sign up
No account, no email, no card
Serkit Open it and go
- Typical trackers
- Signup first
- Spreadsheets
- Yes
-
Blocks, circuits and supersets
Structure with its own rounds and rest, not a flat list
Serkit Built in
- Typical trackers
- Varies
- Spreadsheets
- DIY
-
Offline without an account
Gym basement, aeroplane mode, dead signal
Serkit Fully offline, no account
- Typical trackers
- Offline, but sign in first
- Spreadsheets
- Yes
-
Your data, exportable
One button, full JSON of everything you have logged
Serkit Export and import, free
- Typical trackers
- Varies, often paid
- Spreadsheets
- It's your file
-
No feed, no streak guilt
Nothing on the screen is trying to keep you on the screen
Serkit Training only
- Typical trackers
- Social features
- Spreadsheets
- Yes
Your saved targets are ready when you start, so you can focus on the next set.
You’re Training Before You Finish Reading This
No account, no email, no card. Tap Start Freeform Workout and log your first set. Build a proper routine later, when you feel like it.
Open It
Go to app.serkit.co in any browser and you’re in. Add it to your home screen and it behaves like every other app on your phone.
Choose your workout
Start freeform and add exercises as you go, or choose from 401 exercises and save a routine when you want repeatable structure. Set blocks and rest times when they help.
Follow Your Plan
Every set opens with the saved target for this exact spot in your routine. When recent sessions qualify, Serkit suggests the next step.
Everything You Need.
Nothing You Don't.
Powerful features designed for real training. No bloat. No social feeds. Just tools that help you get stronger.
Context-Aware Progress Tracking
Serkit keeps each saved prescription and progression history in its exact context: which routine, which block, which round, which set. So your heavy squat day and light squat day maintain separate progress histories.
- Start from saved targets Your planned weight and reps are ready when the workout opens
- Multi-round awareness Circuit training? Each round tracks separately
- Safe routine changes Reorganize exercises without losing progress data
- Smart Progression Checks qualifying recent sessions and can suggest more weight, more reps, or a deload
Build Any Workout You Can Imagine
From simple strength programs to complex periodization. Serkit adapts to your training style, not the other way around.
- Multi-variant routines Pro Heavy day and light day in one routine. Schedule each variant on its own day, or pick which one you're running when you start.
- Session-only modifications Swap exercises today without changing your saved routine
- Freeform workout mode Start without a plan, add exercises as you go, save as routine later
- Blocks and circuits Organize exercises into blocks with their own rest periods and rounds
Training that keeps you accountable
Set clear expectations for your training, then track how well you follow through. The schedule flexes when life does, without losing momentum.
- Recurring schedules, free "Every Monday, Wednesday, Friday" or "every 3 days". Both are included on the free plan
- Quota scheduling Pro "3 a week, any days" or "3 in any 7 days". Hit the number without the calendar picking your days
- Completion tracking See what you completed, skipped, or made up late, and stay honest with yourself
- Reminders on your terms Push reminders at a time you choose, resolved in your own timezone
Stay in the Zone, Start to Finish
Whether you're holding a stretch, resting between heavy sets, or flowing through a mobility routine, the timer keeps you moving without watching the clock.
- Perfect for timed holds Stretching, planks, mobility work. Set your duration and focus on the movement
- Optional auto-progression through exercises Flow from one movement to the next automatically. Ideal for yoga and flexibility routines
- Customizable rest periods Heavy lifting needs longer rest; supersets need quick transitions. Set each rest differently
- Screen stays on Glance at your phone mid-stretch without fumbling to wake it up
See What You Can’t Feel Yet
Volume, frequency, estimated 1RM trends and personal records are free. Pro Analytics adds the reads you cannot do by eye, like a lift that has quietly stopped moving or a push/pull imbalance building up.
- Plateau detection Flags a lift that has stopped moving, before you notice it yourself
- Optimal rest per exercise Your own logged rest times, matched against how the following set actually went
- Balance warnings Catches push/pull and upper/lower drift before tilted programming turns into an injury
- Estimated 1RM trends Per-exercise strength curves built from every working set you have logged
Real Accountability That Works
The difference between people who reach their goals and people who quit is usually someone who notices. Connect with a coach, or coach others yourself.
- Being coached is free Accept your coach’s invite code and you’re connected. No subscription needed on your side
- Coaching others is Pro Pro Send routines and schedules straight to a client’s account, no screenshots or copy-paste
- See the real numbers Every set, rep and PR as they log it, including a live view while a session is in progress
- Feedback where the work happened Comment on a specific workout instead of losing it in a chat scroll
- You control the access Choose what a coach can do, change it, or disconnect. Access is revoked immediately
Intelligent Guidance That Knows You
Not generic advice from the internet. An AI that has read every workout you've ever logged, knows your weak points, and gives specific recommendations based on your own training history.
- Context-aware suggestions Ask "what weight for squats today?" and get an answer based on your actual recent performance
- Plateau detection Spots when you're stuck and recommends specific strategies to break through
- Mid-workout answers Get help during your session, not before or after
- Sharper the longer you use it More logged history means more for the coach to reason over. Your data is never used to train a model
Free Gets You Training.
Pro Does the Thinking.
Tracking your workouts and starting each set from its saved target is free and always will be. Pro is for when you want Serkit doing the thinking.
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AI Coach
Not generic advice from the internet. An AI that's read every workout you've logged and answers in your context.
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Pro Analytics
See plateaus before you stall. Find your optimal rest per exercise. Catch push/pull and upper/lower imbalances before they become injuries.
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Adaptive Scheduling
"3 a week, any days" or "3 in any 7." Schedules built around how you actually train, not how the calendar wants you to.
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Routine Power
Push A and Push B under one routine. Schedule each variant on its own day or pick when you start. Update the bench in one place and it propagates everywhere it's used. Unlimited routines.
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Coach Clients
Share routines with the lifters you coach. See their workouts as they log them. Leave feedback in context.
Why I built Serkit
I got tired of fitness apps that cared more about social feeds than about the things people who actually train need. Progressive overload was always the thing they had built least.
So I started building my own, working out in my garage gym at home. It grew from there over time. Eventually I showed it to other people struggling with the same problem and they talked me into making it a real product.
It is still built the way I wanted it for myself. No feed, no streaks, no one trying to keep you on your phone. Just your training.
Josh Klazinga klazinga.com support@serkit.co
Start Free.
Upgrade When Ready.
No hidden fees. No credit card. No account needed to start training.
Free
Everything you need to train and track progress properly.
- Up to 5 routines
- 401 exercise library
- Unlimited custom exercises
- Recurring and one-off scheduling
- Your full workout history
- Full offline functionality
Pro
or $4.99/ month
Everything above, plus the seven Pro pillars listed in the section before this one. Save 35% on the full price. Charged yearly.
See Pro pricingCommon questions
Where do I use Serkit?
In your browser at app.serkit.co. On a phone, add it to your home screen and it opens like an app. There is nothing to download from an app store.
Do I need an account?
No. You can start a workout without one, and your local data stays on your device. Create a free account when you want syncing across devices. Syncing needs a connection.
Can I import workouts from another app?
Yes. In Settings, choose Import from another app and upload a CSV export. Popular fitness app formats are recognised automatically.
Can I train without internet?
Core workout logging works offline, including starting a session and recording sets. AI features and syncing need a connection; changes sync when you reconnect.
What are the free plan limits?
Free includes workout tracking, your full workout history, offline use, backup and restore, and syncing across devices with a free account. You can also receive routines and feedback from a coach.
The limits: up to 5 routines, 5 outstanding one-off schedules and 5 recurring schedules. Archived routines and recurring schedules still count. You can complete up to 5 workouts per day, 25 per week and 80 per month before starting another is blocked.
Pro removes those caps and adds AI Coach, advanced analytics, flexible weekly or rolling workout targets, multiple variants within a routine, linked exercises across routines, and tools for coaching your own clients. Compare Free and Pro.
Can I back up or restore my data?
Yes. Your data can be exported or imported any time. Your data is yours, forever.
Something else? support@serkit.co
Ready to Stop Guessing and
Start Progressing?
Open Serkit and log your first set. No account, no card, about ten seconds.