A personal trainer usually juggles three tools: a calendar, a sheet for payments and an app for clients’ workouts. Studio tries to bring them together. A client is a member with personal details and a medical certificate; a package is a plan with a duration and a price; a session is a one-off appointment in the schedule, with clash detection.
What sets Studio apart is the analysis. Clients record workouts with the free cronowiz phone app and send you the backup (.cwbackup), or give you .fit files from their watch. You import them and see fitness, fatigue and form on the Banister model (CTL, ATL, TSB), the acute:chronic workload ratio, readiness from HRV, heart-rate zones, VO2max, 1RM and tonnage.
Everything stays on your computer, offline. There is no client portal and no automatic sync: data moves as files. That is a choice rather than an oversight, and it has limits, listed below.
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One-off appointments
personal training, consultations, free trials, with a warning when two bookings clash.
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Load and recovery
CTL, ATL, TSB, acute:chronic ratio and HRV readiness for each client.
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Strength and cardio
1RM, tonnage, zones, splits, best efforts and VO2max trend.
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Client linked to athlete
imported workouts feed the reports and the at-risk list.
One client, step by step
You create the client with personal details, notes and a medical certificate with its expiry date. You sell them a plan, for example a three-month package with an enrolment fee, and their status shows as active. You book sessions as one-off appointments.
The client uses the free cronowiz app to log the workouts they do alone. When you meet, they send you the backup and you import it, then link the client to their athlete profile. From there you can see whether load is rising too fast, whether fitness is building, and how 1RM is moving on the main lifts. Digital twin projections estimate where they could get to if they keep going.
If they stop training or do not renew, they appear on the at-risk list: fewer workouts, inactive for 14 days or more, membership expiring without renewal.
Who it is not for
Studio is a computer program. If you work on the move with only a phone, at clients’ homes or outdoors, and want your diary in your pocket, it is the wrong tool: there is no mobile or web version. There is also no app where clients book or pay by card themselves, and no SMS or email reminders.
If you have a studio or a fixed desk and want to see what your clients actually do between sessions, without a monthly fee, this is what it was built for.
What the numbers tell you
Fitness (CTL) is the average load over the last few weeks, fatigue (ATL) the load over the last few days; form (TSB) is the difference. If fatigue runs well above fitness for too long, the client is likely to turn up tired. The acute:chronic workload ratio says the same thing from another angle: a sharp jump in load compared with the average is the signal to watch.
HRV readiness uses resting heart-rate variability to judge whether the client has recovered. On the strength side, estimated 1RM and tonnage show whether the programme is working; on the cardio side, zones, splits, best efforts and the VO2max trend. These are tools for deciding the session, not a replacement for your judgement.
Your gym in one program. Your data in your gym.
Windows and Linux · €199 once, no subscription
The questions people usually ask
Do clients have to use a specific app?
For the full analysis the free cronowiz app works best. Studio also imports .fit files exported by many watches and bike computers.
Does client data arrive automatically?
No. The client sends you a file (.cwbackup or .fit) and you import it. There is no cloud sync.
How many clients can I manage?
Unlimited, both as members and as athletes, at no extra cost.
Can I use it from my phone?
No. Studio runs on Windows 10/11 and 64-bit Linux. There is no mobile or web version.
How much does it cost?
€199 once, with no subscription, including all updates to the major version you buy.
Is there a free option for following a single athlete?
Yes: cw·dashboard, free in the browser, analyses one athlete’s training. It does not include client, membership or schedule management.