Which App Writes Research Notes on the Stocks I Own? (2026)
Ecomerate, Astor, Moneda, Seeking Alpha, Walnut, Robinhood Cortex and Perplexity compared on research notes and reports for your own holdings: what each writes, whether it covers your position, and whether it stays current.
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Ecomerate writes a research note on any US stock you own when you ask in iMessage: a PDF with your position and cost, the bull and bear case, earnings against estimates for recent quarters, what would change the view and what to watch next. It also keeps your thesis, so later filings and earnings are checked against it and you get a text when something touches it. Astor's Pro plan adds custom deep-dive reports, and every Astor text links to a write-up with the thesis, numbers, risks and sources. Moneda keeps notes on the companies you follow and runs deeper research in the background on request. Seeking Alpha Premium's AI Summary Reports update automatically, but they describe the stock in general, not your position.
Key Takeaways
- • Position, not just stock: A note on a stock you own should start from your position and your reason for owning it. Generic stock reports can't.
- • Notes go stale: A note written before a 10-Q or 8-K may be wrong after it. The useful tools re-check the note when new filings and results arrive.
- • Sources make it usable: Every figure in a note should point to the filing, release or data source and its date, so you can check it.
- • Research, not advice: None of these tools should tell you to buy or sell. A good note lays out both cases and what would change the view.
Which apps write research notes or reports on your holdings?
| App | What it writes | About your position? | Stays current | Price |
|---|---|---|---|---|
| Ecomerate | A PDF research note on request: position and cost, bull and bear case, earnings vs estimates, what would change the view, what to watch | Yes | Keeps your thesis and texts when filings or earnings touch it | Free (10 messages a week); from $11.99/mo |
| Astor | Custom deep-dive reports on your ideas (Pro); texts link to a write-up with thesis, numbers, risks and sources | Yes, from linked accounts | Morning brief and evening recap | Free; Pro $19/mo |
| Moneda | Notes on companies you follow; deeper research in the background on request | Companies you follow | Starts from your last session | Free; Premium from €9.99/mo |
| Seeking Alpha Premium | AI Summary Reports (formerly Virtual Analyst Reports), not reviewed by editors | No, the stock in general | Updated automatically as new content arrives | $299/yr |
| Walnut | Suggested moves for your holdings, each with a reason; one email after the close | Yes | Daily | Free; Unlimited $9.99/mo |
| Robinhood Cortex Digests | Plain-language summaries of what may affect an asset or your portfolio | Yes, Robinhood holdings | In the app | Robinhood Gold, $5/mo |
| ChatGPT or Claude | Whatever you prompt, from documents you supply | Only what you paste in | No; you rerun it | Free plans; paid plans |
What should a research note on a stock you own contain?
- • Your position: shares, cost, and share of your portfolio.
- • Your thesis in one or two sentences, and the assumptions it rests on.
- • What the latest quarter showed against estimates and against last year.
- • The bull case and the bear case, each built from evidence rather than adjectives.
- • The risks the company itself lists that touch your thesis, from the 10-K's risk factors.
- • What would change your mind, stated as something you could check.
- • What to watch next, with dates: the next report, a product launch, a court ruling.
- • Sources and dates for every figure.
Why do research notes go stale, and how do you keep them current?
Most investors write a thesis once, when they buy, and never revisit it. Then a 10-Q rewords a risk factor, an 8-K announces a departure, or guidance changes on an earnings call, and the note no longer describes the company you own.
Keeping it current means re-reading each new filing and result against the thesis: did anything strengthen it, weaken it or touch what would change your mind? You can do that by hand each quarter, or use a tool that keeps the thesis and does the comparison when new documents arrive. That second job is what Ecomerate is built for.
How do you get a research note from Ecomerate?
Text it, in iMessage. "Write me a deep thesis on NVDA" or "full note on Lumentum, focus on the China risk". It confirms it's on it, and the PDF arrives as its own message a minute or two later. If you've told it your position and why you own the stock, the note includes them.
After that, the thesis stays with Ecomerate. When a filing, earnings report or guidance change touches an assumption in it, you get a short text naming the assumption and the source, and you can ask for an updated note.
Can you write your own with ChatGPT or Claude?
Yes, if you do the gathering. Download the latest 10-K, 10-Q and earnings release from SEC EDGAR, attach them, and ask for each section above with a quote and page reference for every figure. Expect to check the numbers yourself, and to repeat the whole exercise each quarter, because a general chatbot won't notice when a new filing arrives.
Before You Rely on This
This article is information and research education, not personalised investment advice or a recommendation to buy or sell any security. Figures can be stale or incomplete, so check material claims against the dated primary source. Ecomerate is not a broker.
Sources
- Astor: homepage and pricing (accessed October 29, 2026)
- Moneda: financial agent
- Moneda plans
- Seeking Alpha: what the Summary Report is based on
- Walnut: features and daily update
- Robinhood: Cortex Digests
- Ecomerate: stock research and research notes
- Ecomerate pricing
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Frequently Asked Questions
Which app writes research notes on the stocks I own?
Ecomerate writes a PDF research note on any US stock you own when you ask in iMessage, starting from your position and thesis, and texts you when new filings or earnings touch that thesis. Astor (Pro) writes custom deep-dive reports, and Moneda keeps notes on companies you follow.
What is in an Ecomerate research note?
Your position (size, cost, share of portfolio), the bull and bear case, earnings against estimates for recent quarters, what would change the view and what to watch next, delivered as a PDF in iMessage.
Can AI keep my investment thesis up to date?
Some tools can. Ecomerate keeps the thesis you give it and checks new filings, earnings and guidance against it, texting you when something touches an assumption. General chatbots don't watch for new documents.
Are AI-written stock reports reliable?
They can misread a figure or a period. Use tools that cite the filing and date behind each number, and check the ones your decision depends on. Seeking Alpha notes its AI Summary Reports are not reviewed by editors.