Vigil: Stock Market Alerts
S&P 500 drops, explained
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
About 6 free alerts a year, only when the S&P 500 does something genuinely unusual: what happened, what history shows, your own plan. Premium adds your own number.
Vigil watches the US stock market (the S&P 500) so you don't have to. Most days there is nothing worth your attention, and Vigil says so. When something genuinely unusual happens (a big down day, a new low from the high, a spike in the fear gauge), you get one alert after the close that answers the questions that matter.
SEE ONE BEFORE THE NEXT ONE
Setup replays a real past alert (April 4, 2025) with your own number, so you know what an alert looks like long before the next one comes.
WHAT HAPPENED
A short summary of how news coverage explained the move, with links to the sources. Written by AI and labeled as reporting, not cause and effect.
WHAT HISTORY SHOWS
Every comparable S&P 500 decline since 1950: where it bottomed out, how long the recovery took, and the worst case, not just the average.
WHAT IT MEANS FOR YOU
Enter one rough total, or your exact funds. Vigil turns the day's move into your own number. Your first alert and the replay show it free; Premium shows it in every drop alert and its push.
YOUR OWN PLAN
Write down what you will do when the market falls, while you are calm, next to what history says about that level. Vigil shows it back to you word for word when the market gets there.
HOW OFTEN
The rules fired about 6 times a year since 1990, more in a crisis, none in quiet years. The past-days list shows every alert they would have sent, and what the index did next.
ALSO
• Today: the S&P 500's daily move and distance from its high (in %), a fear-gauge band, your portfolio and your plan
• Headline check: paste a headline or a link and see how much weight it deserves for a long-term investor
• US market only (S&P 500). Funds listed elsewhere are counted by how closely they move with it
• English, 中文, Français, Español
• No ads, no trading, no stock tips
VIGIL PREMIUM
• Your own number in every drop alert and its push
• Every past alert since 1990
• Up to 6 plans at different levels
• 60 headline checks a month (free: 2)
• A mid-session notice if the S&P 500 is down 4% or more (15-minute delayed)
$9.99/month or $59.99/year. Cancel anytime in App Store settings.
Vigil provides information, not investment advice. Market data may be delayed.
Terms of Use (EULA): https://vigil-legal.vercel.app/terms.html
Privacy Policy: https://vigil-legal.vercel.app/privacy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Setup replays a real past alert with your own number, so you know what an alert looks like before the next one
• Enter one rough total instead of listing every fund
• Writing a plan now shows what history says about its level
• Today shows how far the market is from your plan, and the history on noticeable days
• Turn alerts on from Today; a sample notification confirms they reach you
• Your first real alert shows your own number, free
The developer, Keyao Zhu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Financial Info
- Contact Info
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Keyao Zhu
- Size
- 51.4 MB
- Category
- Finance
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Premium Monthly $9.99
- Premium Yearly $59.99
- Copyright
- © 2026 Keyao Zhu