Last updated 29 August 2026
FattyOps is a subscription software service delivered over text message. You tell it what you eat; it does arithmetic and sends you information about it. It is operated by David Moss as a sole proprietor in Kirkland, Washington.
It is not medical advice and it is not a clinician. Nothing it says diagnoses, treats, or prevents anything. It does not know your medical history beyond what you tell it, and it can be wrong — it will tell you when it has been. Anything clinical goes to an actual doctor. If you are struggling with disordered eating, the NEDA helpline in the US is 1-800-931-2237.
FattyOps is delivered entirely by text message. There is no app and no dashboard, so agreeing to receive texts is not an add-on you can decline and still have a service — the messages are the service.
What you get. Replies to what you text in (food, weight, photos), weigh-in reminders at a time learned from your own habits, and periodic progress summaries. Nothing promotional, ever. We do not advertise to you and we do not let anybody else advertise to you.
How often. Message frequency varies and depends on how much you text. This is a conversation rather than a broadcast, so expect messages most days: a few each way on a normal day, a dozen or more on an active one, and none on a quiet one.
Cost. Message and data rates may apply. That is between you and your carrier. We charge the subscription; your carrier charges for the messages, if it charges at all.
Stopping. Reply STOP to any message, also STOPALL, UNSUBSCRIBE, CANCEL, END, or QUIT, and the messages stop immediately. There is no confirmation step, because the carriers require STOP to be instant and unconditional. You then have twelve hours to change your mind: reply START inside that window and everything carries on exactly as it was, same subscription, no new card. After twelve hours the subscription is cancelled outright and no further payment is taken. To come back after that, sign up again at fattyops.ai with your number. Reply HELP, or write to fattyops.ai/contact.
Carriers. Mobile carriers are not liable for delayed or undelivered messages. We cannot guarantee a message arrives, and neither can they.
Who can use it. US mobile numbers, 18 or over. Some carriers will not deliver to some numbers, and there is nothing either of us can do about that.
$12.99 per month, billed monthly through Stripe, renewing until you cancel. Prices may change with at least 30 days' notice by text.
Text CANCEL or STOP to the number and the messages stop immediately, with no confirmation step and no retention offers. Twelve hours later, if you have not replied START, the subscription is cancelled and no further payment is taken. We do not pro-rate or refund the part of the current period you have already paid for. No forms, no phone call.
Text DELETE and everything you have given us is erased within 30 days, including from our processors. Anonymous aggregate statistics, which identify nobody, are kept. See the Privacy Policy and the Consumer Health Data Policy.
One person per subscription. Do not use the service to harass anyone, including yourself. We may end an account that does, and refund the unused part.
The service is provided as-is. Decisions about what you eat are yours. Our total liability is limited to what you have paid us in the previous 12 months.
Text the number, or email the contact form.