Last updated: September 28, 2026
These Terms are an agreement between you and William Ye, an individual doing business as PerSide, located in Pennsylvania, United States ("I", "me", or "Perside"). They govern your use of the Perside app at https://getperside.com. By creating an account or using Perside, you agree to these Terms and to the Privacy Policy. If you do not agree, do not use Perside.
Perside generates strength-training programs for kettlebells, steel maces, heavy clubs, and bodyweight movements, and logs your completed sessions. The programming engine is deterministic software: it computes sets, reps, and weights from the information you give it. It does not know you, cannot see you, and exercises no judgment.
Perside is not a medical device, a medical service, or a substitute for a coach who can watch you move. Nothing in the app is medical advice, physical therapy, or a diagnosis, and using Perside does not create any provider-patient relationship.
Perside provides general fitness programming generated by a deterministic training engine. It is not medical, physical-therapy, or professional coaching advice, and is not a substitute for consultation with a qualified health professional. Strength training with kettlebells, clubs, maces, and similar implements involves inherent risks including but not limited to muscle strain, joint injury, and dropped-implement impact. By using Perside you acknowledge these risks and assume full responsibility for your training. Consult a physician before beginning any program, especially if you have a pre-existing condition, injury, or are pregnant. Stop immediately and seek medical attention if you experience pain, dizziness, or unusual symptoms. Perside and its creators are not liable for any injury, loss, or damage arising from use of the app.
Strength training with maces, clubs, and kettlebells carries a real risk of injury, including serious injury. These implements involve ballistic, rotational, and overhead movement. Loads that are safe with good technique can be dangerous with poor technique, and Perside cannot observe your technique, your fatigue, your surroundings, or your health. The numbers it prescribes are computed from data you entered. They are a starting point, not a clinical judgment.
By using Perside you agree that:
If you cannot accept these risks, do not use Perside.
You must be at least 18 years old to use Perside.
You can sign in with a one-time magic link sent to your email address — there is no password — or by continuing with your Google account. If you sign in with Google, Perside receives your Google account ID, your email address, whether Google has verified that email address, your name, and your profile picture URL if you have one. We never see or store your Google password, and we never access anything else in your Google account.
Perside identifies your account by email address. If you sign in with Google using an email address that already has a Perside account and Google has verified that address, you will be signed into that same existing account rather than a new one.
Because a magic-link sign-in has no password, anyone with access to your email inbox can access your Perside account. Keep your email account secure. You are responsible for activity that happens through sign-in links or Google sign-in on your account. Tell me at support@getperside.com if you believe your account has been accessed without your permission — you can also sign yourself out of every device at once from Profile → Account ("Sign out everywhere"), which invalidates every active session within a few minutes.
Do not: use Perside to break the law; probe, overload, or interfere with the service or its sign-in system (including trying to bypass the Cloudflare human-verification check on the sign-in forms); attempt to access another person's data; scrape the service; or reverse engineer it except where the law gives you that right regardless of contract. I may suspend or terminate accounts that do these things.
Program names and session notes you write belong to you. You give me permission to store and process them for one purpose only: operating Perside for you. As explained in the Privacy Policy, please keep medical information out of your notes.
You can delete your account yourself at any time from Profile → Account → Delete account. This permanently and immediately removes your account and everything associated with it — every program, cycle, logged session, benchmark and sizing result, freeform entry, body measurement, achievement, and your consent and disclaimer records — from Perside's live database, in one step, with no grace period and no way to undo it. See the Privacy Policy for what a small number of infrastructure providers keep afterward (for example, in encrypted backups) and for how long.
You can also request a copy of your data or ask me to delete it by emailing support@getperside.com — see the Privacy Policy's "Deletion, export, and your rights" section for what that covers and the timeline.
The Perside software, design, name, and everything in the app other than your own content belong to me or my licensors. These Terms give you a personal, non-transferable right to use the app, and nothing more.
Perside is run by one person and offered free of charge today. I may change, suspend, or discontinue features or the whole service. If I discontinue the service, I will make reasonable efforts to give you notice and a chance to request your data first. You can stop using Perside, and delete your data yourself, at any time.
PERSIDE IS PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTIES OF ANY KIND, whether express, implied, or statutory, including implied warranties of merchantability, fitness for a particular purpose, and non-interruption. I do not warrant that prescriptions are appropriate for you, that the service will be error-free or uninterrupted, or that data will never be lost. Keep your own records of anything you cannot afford to lose. Some jurisdictions do not allow the exclusion of implied warranties, so some of the above may not apply to you.
To the fullest extent permitted by law:
Some jurisdictions do not allow limits on certain damages, including liability for personal injury caused by negligence in consumer contracts. In those places these limits apply only to the extent the law allows, and nothing in these Terms excludes any liability that cannot lawfully be excluded, including liability for gross negligence, willful misconduct, or fraud.
If your violation of these Terms or of the law causes a third party to bring a claim against me, you agree to cover the reasonable costs and damages arising from that claim. This section does not apply to claims arising from my own breach of these Terms.
You may stop using Perside at any time and may delete your account yourself under Section 7. I may suspend or terminate your access if you violate these Terms, with notice where practicable. Sections 2, 6, 7, 8, and 10 through 16 survive termination.
These Terms are governed by the laws of the Commonwealth of Pennsylvania, United States, without regard to conflict-of-law rules. Before filing any claim, you agree to email support@getperside.com and give me 30 days to try to resolve the problem informally. Any claim that cannot be resolved informally must be brought in the state or federal courts covering Chester County, Pennsylvania, and both of us consent to those courts, except that you may bring an eligible claim in small claims court where you live. If you are a consumer, nothing in this section takes away protections that the mandatory consumer law of your home jurisdiction gives you.
If I change these Terms in a way that matters, I will update the date above and give notice in the app or by email. Continuing to use Perside after a change takes effect means you accept the new Terms. If you do not accept them, stop using the service and delete your account.
If part of these Terms is found unenforceable, the rest remains in effect. My not enforcing a provision is not a waiver of it. You may not assign these Terms; I may assign them in connection with a transfer of the service, and your rights under them will be preserved. These Terms and the Privacy Policy are the entire agreement between us about Perside.
William Ye, doing business as PerSide
Pennsylvania, United States
support@getperside.com