How to start a Subscription Auditor for Forgetful Brains business: plan and growth
People with ADHD pay for forgotten subscriptions for years because opening the bank app and decoding the charge list is itself an executive-function task.
An owner can start “Subscription Auditor for Forgetful Brains” from a complaint people already posted. The offer, in one line: A read-only bank connection that finds every recurring charge, explains it in plain English and cancels in one tap. It is for people with ADHD and consumers. Charge a free tier and a paid upgrade, and test a price under $10 a month. Begin in the United States. Buyers already talk about this in r/ADHD. One thread gathered 31 votes and 39 replies across Sep 14, 2026 – Oct 14, 2026. Use that room to meet the first twenty buyers. Do not export it, and do not republish the posts. The idea, the evidence, and the market estimate on this page are free to read. Two paid prompts finish the job: one drafts the offer, the price, and a ninety-day calendar; the other drafts a month of conversations and proof. One credit unlocks both. A software specification is not on this site. When the company is the product itself, a single link further down opens the founder library.
Do any of you actually remember to cancel…r/ADHD · Sep 14, 2026 – Oct 14, 2026 · 31 votes · 39 replies · Open the thread
Who would pay
People with ADHD and consumers. Start in the United States, and charge a free tier and a paid upgrade, testing a price under $10 a month.
The thread above is the public complaint this business can learn from. Verbatim quotes are not invented. Further sources, when a later report adds them, stay with the evidence.
What buyers use today
- Rocket Money
- Bank app subscription lists
The offer, in our words
Connect read-only to the bank, auto-detect recurring charges, explain each service in plain language and start cancellation with one click.
Score 2.85, Simmering. Pain, willingness to pay, demand, and the gap in current options drive it. We are not scoring how fast you can code.
Market size
An estimate, built from the bottom up: real customer counts × a realistic price. It shows the size of the prize, not a forecast.
TAM Total addressable
$281M a year
7.8M adults · 50% of US adults with a current ADHD diagnosis
SAM Serviceable
$82.8M a year
2.3M adults · reachable through ADHD communities and app stores
SOM Obtainable in 3 years
$828K a year
23,000 adults · 1% of the reachable segment in three years
What that means
23,000 adults at $3/mo = $828K ARR
Medium confidence · estimated Oct 2026
How we estimated this
- Base: 15,500,000 US adults with a current ADHD diagnosis.
- Has the problem: 50% (assume half manage their own subscriptions and lose track).
- Revenue per adult: $36 per year ($2.99/mo).
- Reachable: 30% (reachable through ADHD communities and app stores).
- Three-year capture: 1% of the reachable segment.
TAM is customers with the problem × revenue per customer. SAM is the part a new business can reach. SOM is a cautious three-year share of SAM. The bars use a log scale. A share marked “assume” is our judgment, not a measurement.
The business-plan prompt
The offer, the price, and a ninety-day calendar, written for an agent. 1 credit unlocks both prompts for this idea: this plan and the growth playbook below.
# Business plan prompt: Subscription Auditor for Forgetful Brains You are writing a practical plan for one owner who will sell this as a business. Do not write a software specification, a venture memo, or a feature list. Use short sentences. Where a number is unknown, give a range and say what to measure. ## The business Working name: Subscription Auditor for Forgetful Brains What the customer gets: A read-only bank connection that finds every recurring charge, explains it in plain English and cancels in one tap. Who pays: People with ADHD and consumers
Locked · the first lines are above
Unlock both prompts for this idea · 1 credit ($9.99)
One credit opens the business plan and the growth playbook together, for good. Credits work on both businessideastobuild.com and realstartupideas.com.
Sign in once with your Real Startup Ideas account; the same credits work on both sites.
The growth playbook
Thirty weekdays of conversations and proof. Not an ad plan. Included with the plan above, on the same credit.
# Growth prompt: Subscription Auditor for Forgetful Brains You are planning thirty days of distribution for a business that already has an offer. The offer: A read-only bank connection that finds every recurring charge, explains it in plain English and cancels in one tap. The buyer: people with ADHD and consumers. Price band: under $10 a month. Do not propose ads, a viral loop, or a rebrand. Propose conversations, proof, and a repeatable weekly rhythm. ## Starting point A public thread in r/ADHD drew 31 votes and 39 replies. The pain, in the owner's words: People with ADHD pay for forgotten subscriptions for years because opening the bank app and decoding the charge list is itself an executive-function task.
Locked · the first lines are above
Unlock both prompts for this idea · 1 credit ($9.99)
One credit opens the business plan and the growth playbook together, for good. Credits work on both businessideastobuild.com and realstartupideas.com.
Sign in once with your Real Startup Ideas account; the same credits work on both sites.
Questions
How much money do I need to start?
Enough to talk to buyers and deliver the offer once. A service version can start with a written process and a way to take payment. A software version is a larger bet and is not required to test the price. The band to test is Under $10 a month.
How should I price it?
Test a price under $10 a month, charged as a free tier and a paid upgrade. Raise it after three paid pilots, not before the first conversation.
Where do the first customers come from?
r/ADHD is the clue. A related thread gathered 31 votes and 39 replies. Show up there, follow the room's rules, and ask for conversations. Do not scrape it.
Do I need to write code?
No. The prompts on this page draft a plan and a month of growth. Code is a later choice. The founder site linked once below is where the build document lives, if you want it.
When the business is the software itself, the specification lives on the founder site. PRD and build options
A two-week build starts at $10,000 on that site, after a $1,000 scoping fee.
Plans and growth playbooks
One credit opens both prompts for this business.
The idea, the evidence, and the market estimate stay free. The business plan and the thirty-day growth playbook for Subscription Auditor for Forgetful Brains cost one credit, together, and stay unlocked.
Credits work on both businessideastobuild.com and realstartupideas.com. Sign in once with your Real Startup Ideas account; it is the same wallet.