Terms of Service
Last updated 4 August 2026These terms govern your use of CrashCompute. By using the site or creating an account, you agree to them.
Read this part even if you read nothing else. CrashCompute performs arithmetic on figures you supply. It does not measure a scene, verify your inputs, or exercise judgement. Every result depends entirely on the quality of your measurements and on your choice of the right method. Nothing here replaces training, scene measurement, or professional judgement, and no output should be presented as a conclusion you have not independently satisfied yourself of.
1. What the service is
CrashCompute provides web-based worksheets that reproduce published traffic crash crash-analysis equations, together with optional cloud storage for case files. The calculators are free to use. Paid plans add cloud cases, file attachments, exhibit packs and collaboration features.
2. No professional advice, and no warranty of results
The equations implemented here come from published crash-investigation literature. Their applicability to any specific collision is a matter for the investigator. We do not warrant that any result is accurate, admissible, or suitable for a given purpose.
You are responsible for verifying every figure you rely on, for confirming that a method fits the circumstances, and for any use made of a result in a report, a charging decision, or testimony.
3. Accounts
- You must provide accurate information and keep your credentials secure.
- You are responsible for activity under your account.
- Accounts are for individuals. On team plans, each person should have their own seat rather than sharing one login.
- You must be old enough to form a binding contract where you live.
4. Your data stays yours
You retain all rights to the case files, measurements and notes you enter. We claim no ownership over them. We store and process them only to provide the service, as described in our Privacy Policy.
You can export any case at any time. If your subscription lapses, your existing cases remain readable and exportable — you will not be locked out of your own casework.
5. Subscriptions and billing
- Paid plans are billed in advance, monthly or annually, through Stripe.
- Subscriptions renew automatically until cancelled.
- You can cancel at any time from your account. Cancellation stops the next renewal; access continues to the end of the period you have paid for.
- Prices may change. We will give notice before a change affects a renewal.
- Fees are exclusive of any applicable taxes.
Refunds. We do not offer automatic refunds for partial periods. If something has gone wrong, write to crash@crashcompute.com and we will deal with it sensibly.
6. Retention, storage and deletion
How long we keep cloud cases. Retention is attached to the plan a case was created under, not the plan you are on today: Free keeps a case 90 days, Investigator and Team 12 months, Department 24 months, and Agency 36 months or a period agreed with you. A case made during a trial or a paid subscription keeps the period it was created under even if the account later moves to Free. We do not shorten retention retrospectively.
Storage limits. Plans differ in how many cloud cases an account may hold at once — 3 on Free, 15 on Investigator, 150 pooled on Team, 500 pooled on Department — and in how many files may be attached to each case. Reaching a limit prevents you creating new cloud cases. It never prevents you opening, printing or exporting the cases you already have, and it never causes anything to be deleted.
If your subscription lapses or you move to a lower plan. Nothing is deleted. Every case you have made remains readable, printable and exportable. If you hold more cases than the new plan allows, you will not be able to create further cloud cases until you export or remove some, or move back up a plan.
Deletion is delayed by five days. When an account is deleted — by you, by us, or because a case reached the end of its retention period — the data is archived rather than destroyed. During those five days it can be restored on request, including after an accidental deletion. Sign-in is suspended during that window rather than removed, so a restored account is your account and not a new one.
After five days, deletion is permanent. When the window closes we destroy the case records, any attached files, and the account itself. We hold no backup from which they can be recovered, and no part of this is reversible. Export anything you need before deleting an account.
Export is always available. Every plan, including Free, can download every cloud case on the account as a single file at any time, from the account page. Export is never limited by your plan, by how many cases you hold, or by whether a case is inside the five-day archive window. Worksheets you run without an account stay on your own device and are yours to export at any time.
Legal hold. A case placed on legal hold is exempt from expiry. Because case files may be evidence, we do not delete case contents on a timer without notifying you first.
You remain responsible for retaining your own authoritative records in line with your agency’s policy. CrashCompute is not a system of record.
7. Shared case links
A cloud case link grants access to anyone holding it. You are responsible for who you send links to. Do not share a link containing sensitive investigative material with anyone not entitled to see it.
8. Acceptable use
You agree not to:
- Attempt to breach, probe, or circumvent the security of the service or another user’s data.
- Resell or redistribute access, or share a paid seat with people who do not hold one.
- Use automated means to scrape or bulk-download the service.
- Upload unlawful content, or anything you do not have the right to store.
- Interfere with the operation of the service or the third-party services it relies on.
9. Availability
We aim to keep the service running but do not guarantee uninterrupted availability. We may change, suspend, or discontinue features. If we discontinue the service entirely, we will give reasonable notice and a means to export your cases.
The calculators work offline once loaded. That is deliberate: an outage should not stop you working a scene.
10. Limitation of liability
To the fullest extent permitted by law, CrashCompute is provided “as is”, without warranties of any kind, express or implied. We are not liable for indirect, incidental, special, consequential or punitive damages, or for lost profits, lost data, or the outcome of any investigation, prosecution or proceeding.
Our total liability arising out of or relating to the service is limited to the amount you paid us in the twelve months preceding the claim.
11. Termination
You may stop using the service and delete your account at any time. We may suspend or terminate an account that breaches these terms, or where required by law. On termination you may export your case data for a reasonable period.
12. Changes to these terms
We may update these terms. The date at the top of this page shows when they last changed. Continuing to use the service after a change means you accept the updated terms.
13. Governing law
These terms are governed by the laws of the State of Florida, United States, without regard to conflict of law rules.