Roommate money app
Sample team · Venture Workshop · 2026-10-25 · Part A · deep tier
The call Build (dry run)
Dry run: 3 deep pains by the code rule; a live run writes the real insight.
Confidence: low. What would change this call: Dry run placeholder.
Value proposition
We help college students who share an apartment with two or more roommates with: ok so me and my roommates in queens always fight about who paid for what, like groceries and con ed and the wifi.
Gauges
Pain and Reach both need 7 or more for a confident call.
Pain 10/10
Rule: 3 + 2 per deep pain (3) + up to 2 for action or money rows (9). (Sharpen interview score: 7/10.)
Sources: r/roommates post: I made a free calculator for the "who pays more for… · r/roommates post: Free rent split calculator that handles room size… · tricount: Split & Settle Bills · 1★ review: Missing most important… · r/roommates post: do you share groceries with your roommates or keep…
Reach 8/10
Copied from the Sharpen interview in a dry run. (Sharpen interview score: 8/10.)
Edge 4/10
Copied from the Sharpen interview in a dry run. (Sharpen interview score: 4/10.)
Evidence
| Claim | Supports | Rung | Source |
|---|---|---|---|
| Competition | |||
| tricount: Split & Settle Bills is one of the closest apps on the App Store. | context | market | tricount: Split & Settle Bills |
| Split Pay: Split Bills in Two is one of the closest apps on the App Store. | context | market | Split Pay: Split Bills in Two |
| Splitwise is one of the closest apps on the App Store. | context | market | Splitwise |
| Audience | |||
| A quote from a deep pain cluster (dry-run keyword rule). | pain | talk | r/roommates post: I made a free calculator for the "who pays more for… |
| A quote from a deep pain cluster (dry-run keyword rule). | pain | talk | r/roommates post: Free rent split calculator that handles room size… |
| A quote from a deep pain cluster (dry-run keyword rule). | pain | talk | tricount: Split & Settle Bills · 1★ review: Missing most important… |
| A quote from a deep pain cluster (dry-run keyword rule). | pain | talk | r/roommates post: do you share groceries with your roommates or keep… |
| Pricing | |||
| Mentions paying, subscribing, or upgrading (dry-run keyword rule). | pain | money | r/personalfinance post: Becoming single, what should I look out for… |
| Mentions paying, subscribing, or upgrading (dry-run keyword rule). | pain | money | r/roommates post: flatmate not letting me access the resources i have… |
| Context | |||
| Maxi is a Y Combinator company working on something nearby. | context | market | Maxi |
| Coupl is a Y Combinator company working on something nearby. | context | market | Coupl |
Three next moves (this week)
- Price it and quote the next five. Put a price on the first version and quote it to five college students who share an apartment with two or more roommates. The ask: A yes or no at a named price.
- Take deposits, not interest. Put a small refundable deposit behind the sign-up button on a one-page site. The ask: A refundable deposit.
- Set a threshold before building. Decide how many paid commitments justify building, and refund everyone if you miss it. The ask: A pre-order.
Part review
| Part | Rating | Comment | Suggested rewrite |
|---|---|---|---|
| Who | ok | Dry run: not reviewed. | — |
| Pain | ok | Dry run: not reviewed. | — |
| Solution | ok | Dry run: not reviewed. | — |
Only weak parts get a rewrite. The founder's original wording above is kept either way.
Devil's advocate: the case for Park
Dry run placeholder. A live run argues the strongest case against "We help college students who share an apartment with two or more roommates with: ok so me and my roommates in queens always fight about who paid for what, like groceries and con ed and the wifi." from the interview.
- Placeholder: is the pain frequent enough to change behavior?
- Placeholder: will people pay, or only agree it's annoying?
- Placeholder: can a free incumbent copy this quickly?
What would change the advocate's mind: Placeholder: deposits or pre-orders from strangers.
Stage 2 · Pain map
Sources read: 25 Reddit posts and comments, 0 cited web quotes, 16 Hacker News comments, 36 low-star App Store reviews. 59 became evidence rows.
Deep Mentions of "split"
Dry run: 38 rows grouped by keyword, not by meaning. (38 rows from 15 distinct sources; action or money signal: yes)
“I made a free calculator for the "who pays more for the bigger room" question. Every week someone asks some version of "my room is bigger / has its own…”
“Free rent split calculator that handles room size, shared space and a private bathroom. The usual fight is the big room. Splitting purely by square feet overcharges it, because everyone…”
“Missing most important feature. How does this app average 4.9? While it shows the balance of who owes what, it doesn’t show any detail. It’s impossible to ask for repayment…”
Shallow Mentions of "splitwise"
Dry run: 10 rows grouped by keyword, not by meaning. (10 rows from 1 distinct source; action or money signal: yes)
“Notification manipulation. This app like many others spams useless notifications to your phone. This is a manipulation tactic (Hook Model) to ensure you are more likely to use them again.”
“Predatory, dishonest, disgraceful customer service. Wish I could leave zero stars.. Splitwise’s business practices and customer service are absolutely appalling. I signed up for Splitwise for a ONE-TIME USE and…”
“Was good like 4 years ago. New app sucks. Just use a spreadsheet and save your cash. The free version is basically useless. The paid version isn’t worth it.”
Deep Mentions of "roommates"
Dry run: 8 rows grouped by keyword, not by meaning. (8 rows from 8 distinct sources; action or money signal: yes)
“do you share groceries with your roommates or keep everything separate?. we tried splitting everything once and it got weird fast. now i'm wondering if anyone actually makes shared food…”
“Roommate used my pan. When my roommate moved in, we clearly talked about what kitchen stuff we wanted shared and not. I told her that I did not want my…”
“Is my roommate inconsiderate or what?. I am not very familiar with roommates, so I can't tell what is exactly a normal roommate behavior. To elaborate, I live in a…”
Deep Mentions of "bills"
Dry run: 3 rows grouped by keyword, not by meaning. (3 rows from 3 distinct sources; action or money signal: yes)
“For two roommates who share a joint account: an iPhone app that tracks the balance and who's paying in. A lot of roommate money stress isn't about one big bill.…”
“Your roommate owes you thirty dollars and just bought something nice. You said nothing.. There is a job in every shared house that nobody applies for. It goes to whoever…”
“Becoming single, what should I look out for or do financially. Basically I'm going to be getting an uncontested divorce soon. I filled out most of the paperwork, but I…”
Where they gather: r/roommates · r/personalfinance · Hacker News · tricount: Split & Settle Bills reviews · Split Pay: Split Bills in Two reviews · Splitwise reviews
Trigger moments:
- When my roommate moved in, we clearly talked about what kitchen stuff we wanted shared and not.
- She takes the trash out when she sees it is full, I do so.
- The two girls were living here before me, so they had already picked their rooms when I moved in.
- Early when i first moved in, my roommates have told me that they usually split certain things altogether.
Stage 3 · Market scan
This table was written by rules from App Store and YC data, not by the model.
| App or company | Rating | Ratings | Price | Launched | Updated | Positioning | Biggest gap |
|---|---|---|---|---|---|---|---|
| tricount: Split & Settle Bills | 4.9 | 7,495 | Free | Join over 21 million users worldwide who trust tricount to split bills, track expenses, and settle up—free and unlimited. | Low-star reviews: "Was good until it wasn’t….", "Cannot add 2 expenses correctly", "Good UI, bad calculations" | ||
| Split Pay: Split Bills in Two | 4.9 | 20,315 | Free | Split Pay turns your biggest bills into two smaller payments, timed to your paychecks. | Low-star reviews: "App is a set up", "Refused to give me an opportunity to correct a mistake", "Okay app but customer RUDE" | ||
| Splitwise | 4.0 | 29,053 | Free | Splitwise is the easiest way to share expenses with friends and family and stop stressing about “who owes who”. | Low-star reviews: "Confusing and impractical", "Notification manipulation", "Greedy" | ||
| PaySplit: Split Bills & Rent | 5.0 | 1 | Free | Split shared bills without the awkward math. | No low-star reviews collected. | ||
| Deferit: Pay bills in 4 | 4.8 | 36,382 | Free | Budget and pay bills in 4 smaller payments. | No low-star reviews collected. | ||
| iSplit: Split Bills & Expenses | — | 0 | Free | iSplit is the easiest way to share expenses with friends, roommates, travelers, and family, and stop stressing about who owes who. | No low-star reviews collected. |
Y Combinator companies nearby: Maxi (Active): AI Agent for your personal finances · Coupl (Active): Banking designed for Indian couples. · SaveIN (Active): Making private healthcare in India accessible and affordable · Orca (Active): Banking for Gen Z, on steroids.
White space: Not assessed by rules. A model write-up compares what each competitor leaves unserved.
Market size (bottom-up):
- TAM: Not estimated by rules.
- SAM: Not estimated by rules.
- SOM: Not estimated by rules.
UX teardown from App Store screenshots
tricount: Split & Settle Bills
- Onboarding: Dry run: not assessed.
- Paywall: Dry run: not assessed.
- Core loop: Dry run: not assessed.
- Broken, per reviews: Dry run: see the low-star reviews in the pain map.
- Lesson: Dry run: a live run reads the screenshots.
Split Pay: Split Bills in Two
- Onboarding: Dry run: not assessed.
- Paywall: Dry run: not assessed.
- Core loop: Dry run: not assessed.
- Broken, per reviews: Dry run: see the low-star reviews in the pain map.
- Lesson: Dry run: a live run reads the screenshots.
Splitwise
- Onboarding: Dry run: not assessed.
- Paywall: Dry run: not assessed.
- Core loop: Dry run: not assessed.
- Broken, per reviews: Dry run: see the low-star reviews in the pain map.
- Lesson: Dry run: a live run reads the screenshots.
Dry run placeholder. A live run reads 2 screenshots per app.
How this was scored
Dry run: scores come from fixed rules, not a model. Pain uses the deep-pain rule; Reach and Edge are copied from the interview.
- Gauges use the CEO Signal rubric: Pain and Reach must both reach 7 for a confident call.
- Evidence is graded talk → action → money. A pain counts as deep only with 2+ distinct sources and at least one action or money signal.
- Every quote was checked against its source text, and every claim links to a page returned by a real search or data tool during this run. Anything that failed either check was dropped.
Search interest, for context only (not scored): split bills · roommates
Run notes
- Paid web search skipped in this dry run (a live run would use up to 2 searches).
- Dry run: the competitor table was written by rules from App Store and YC data.
Sharpen interview
- Coach: Where could you message ten of these people this week, and how many are there?
Founder: I'm on the e-board of a 400-member Baruch student club and in two group chats of about 300 Baruch students who live off campus; people post roommate money drama there weekly. - Coach: What happens the day this goes wrong, and what do people do instead today?
Founder: We used Splitwise for a year, then it added a daily limit on adding expenses unless you pay for Pro, and my roommates stopped logging things, so now we argue over Venmo requests. - Coach: Where could you message ten of these people this week, and how many are there?
Founder: Four friends from other apartments told me they have the same problem and two of them pay for Splitwise Pro just to keep track. - Coach: What can you put behind a test this month, in dollars and hours per week?
Founder: I can spend about $100 and 6 hours a week on a test this month.
Projected cost of a live run
Nothing was spent. Estimated lines measure the real prompts this run built (about 4 characters per token) and assume a typical reply length. Assumed lines cover paid web searches, whose size depends on what they find. Tavily searches are free and not listed.
| Stage | Model | Input tokens | Cache reads | Output tokens | Web searches | Cost | Basis |
|---|---|---|---|---|---|---|---|
| Sharpen | claude-sonnet-5-5 | 8,676 | 0 | 4,500 | 0 | $0.062 | earlier run |
| Sharpen (auto founder) | claude-haiku-5-5 | 2,586 | 0 | 1,000 | 0 | $0.001 | earlier run |
| Devil's advocate | claude-sonnet-5-5 | 435 | 0 | 900 | 0 | $0.010 | earlier run |
| Dig (web search) | claude-sonnet-5-5 | 15,500 | 0 | 1,500 | 2 | $0.066 | earlier run |
| Dig (extract) | claude-haiku-5-5 | 13,177 | 0 | 10,840 | 0 | $0.007 | earlier run |
| Dig (cluster) | claude-sonnet-5-5 | 3,604 | 0 | 2,000 | 0 | $0.027 | earlier run |
| Scan (market search) | claude-sonnet-5-5 | 15,500 | 0 | 1,500 | 2 | $0.066 | earlier run |
| Scan (write-up) | claude-sonnet-5-5 | 1,394 | 0 | 1,800 | 0 | $0.021 | earlier run |
| Scan (UX teardown) | claude-opus-5-5 | 3,299 | 0 | 2,500 | 0 | $0.063 | earlier run |
| Verdict | claude-opus-5-5 | 8,790 | 0 | 7,000 | 0 | $0.175 | estimated |
| Total | $0.498 |
Budget: $1.20. Within budget.
0 unsourced claim references were dropped.