Opportunities › Cross-platform note-taking with corporate-friendly sync › Proposed app
Tether Notes
Markdown notes that sync through your own Dropbox, on desktop and phone
- Score
- 50
- confidence 49
- Evidence
- 6
- items on the page
- Rivals
- 2
- named in sources
- First version
- 45 d
- estimate
- Type
- Desktop and mobile
- PWA: on computers and phones alike
- Market since
- 2016
- Established market · AI estimate
ScreensConcept
Desktop and mobile: Users write and organize notes at a desk but also capture quick thoughts on phones throughout the day, with sync critical to both. Sample screens on a computer and a phone, in the proposed brand. Their numbers are sample data.
Meeting notes
Saved to Dropbox- FolderWork/2026
About this appAI proposal
Tether Notes is a markdown note app for people whose work laptop is locked down. It installs through a package manager such as Homebrew and also runs as a web app on your phone, so it needs no App Store account and no iCloud.
Sync is built in, not a plugin. Your notes are plain markdown files in a Dropbox folder you choose, and the app keeps every device in step with that folder. No separate sync service sits in the middle, and no one else holds your notes.
It is made for knowledge workers who ended up with half their notes in one app and half in another because sync would not work at the office. You can pay once rather than rent it.
- Tagline
- Markdown notes that sync through the Dropbox your company already allows.
- Voice
- plainsteadypractical
- Why this name
- A tether holds two things together without fuss. Notes stay tied to your Dropbox folder across every device. Short and easy to say.
In the first version
Members say which features they would use. It tells PWAS what people want; it changes no score.
Dropbox sync built in
Connect a Dropbox folder once. Desktop and phone read and write the same files, with no plugin to install or keep updated.
No member yet
Installs from Homebrew
Install and update with a package manager command, so it fits corporate laptops where the App Store is blocked.
No member yet
Works on your phone as a web app
Add it to your home screen from the browser. No store listing is needed, and notes open offline.
No member yet
Plain markdown files
Every note is a normal .md file in your folder. Open it in any editor, and leave whenever you like.
No member yet
Brand identityAI proposal
Check the name against trademark registers before using it.
Palette
#F6F1E7Paper · surface#1F2A27Ink · text#2F6B57Pine · primary#C4623AClay · accent#B9C9BCSage · secondary surface#5B6B66Slate · muted text / data
Typography
Aa
Tether Notes
PricingAI proposal
Verified: Bear lists $2.99 a month plus a free plan; Obsidian lists $5 to $10 a month plus a free plan. Sources say users would pay a high one-time price, but give none, so these tiers are a starting point to test.
Free
Free
- One Dropbox folder
- Up to 100 notes
- Markdown editor and search
Personal
$59 once
- Unlimited notes
- Desktop and phone sync
- Updates for one year
- Conflict viewer
Annual upgrade
$19 a year
- New versions after year one
- Keep your licence if you stop
Would you pay Annual upgrade · $19 a year?
Your answer tells PWAS which prices people accept. It changes no score.
No answers yet.
What it could be worthEstimate
What a software business making this much sells for today, from real deals. Pick a monthly revenue.
If it makes
Worth about
$194,000
Sale range $132,000 to $263,000
$120,000 a year in revenue
From 87 software businesses listed and sold on Empire Flippers in the last year, revenue vetted by the broker: they sell for about 19× their monthly revenue, most between 13× and 26×.
Measured on profit, the middle deal is 32× monthly net profit: about 2.7 years of profit.
An estimate, not an offer or financial advice. A real price depends on profit, growth, churn, how much of the work is the owner's, and the buyer.
How it would growAI proposal
How the product would reach new customers through its own use, and how the first ones would be found. A plan to test, not a result.
- Built-in loop
- No loop in the product. Notes are private and stay in each user's Dropbox, so use does not expose the product to others. Growth comes from content, community posts and word of mouth among coworkers.
- Do they become customers?
- Sharing is not built in. Test whether coworkers on the same locked-down fleet recommend it, and whether searches for Homebrew note apps convert to paid licences.
- First customers
- Mac users at large companies with locked-down laptops and Dropbox, who now use Bear or Obsidian: engineers, product managers and consultants.
- Where to reach them
- Hacker News and Reddit: Post a Show HN and answer threads about Obsidian and Bear sync, offering a free beta to commenters.
- Homebrew and dev blogs: Publish the Homebrew install and write a guide on notes for locked-down work laptops.
- Obsidian and Bear communities: Offer a markdown import and a migration guide in their forums and Discords.
- First milestone
- Twenty paying customers from one corporate group, with at least half still syncing across two devices after 30 days.
Why people already pay for this
- AI inferenceKnowledge workers at corporations cannot install AppStore apps or access iCloud on corporate laptops, breaking sync for popular note apps.
- Public claimUsers of Obsidian and Bear would pay a high one-time price and upgrade fees for an alternative addressing these sync and installation constraints.
- Public claimObsidian's Dropbox syncing through plugins is unreliable on mobile with no reliable community-supported option.
- Public claimObsidian's plugin ecosystem is messy and difficult, and users distrust Obsidian's built-in sync service.
- Verified
Tech stack
Every proposal builds on the same PWA base, installable from the browser on any phone or computer. Dashed boxes are what this app adds.
- AppNext.js and TypeScript
- PWAManifest and service worker
- UITailwind CSS
- Data and authSupabase Postgres
- PaymentsStripe
- EmailResend
- HostingVercel
- This app · Desktop packagingInstallable desktop app shell, published to HomebrewThe web app alone cannot be installed through a package manager, which is the key need.
- This app · Sync engineDropbox API client with local file cacheBuilt-in sync on desktop and mobile with offline edits and conflict detection.
RisksAI inference
- PlatformPhone web apps have limits on background sync and storage, especially on iOS. Sync may only run when the app is open, which could disappoint users.
- TechnicalTwo-way file sync with conflicts is hard to make reliable. Unreliable sync is what we claim to fix, so bugs hit the main promise.
- CommercialWillingness to pay a high one-time price comes from public claims on one forum, not verified. Free and low-cost rivals may be enough for many users.
- RegulatoryCorporate IT may block unknown software or Dropbox API access, even where Dropbox is allowed. Installing from Homebrew may not be permitted everywhere.
- PlatformThe product depends on Dropbox API terms and rate limits, which could change.
Everything marked AI proposal or AI inference was written by a model from the evidence on the opportunity page. The proposed name must be checked against trademark registers before it is used.