For iPhone. Small caps. Plain numbers.

See the spike.
Know the risk.

When a small stock jumps on huge volume,
Undertow shows what usually happens next.

Live alerts, the record of 22,000 past spikes, SEC filings in plain words, and who holds the company. Facts, never tips.

Spike alerts with the record since each alert
Undertow / iOS

01 / The record

67%

of 22,399 small-stock spikes since 2014 were lower six weeks later.
About 4 in 10 rose another 20% first. Undertow shows both, on every alert.

02 / What you get

Everything behind the move.

Alerts

Spikes as they happen

Live alerts on today's biggest small-cap moves, each graded against the past spikes most like it.

Edge

The record, in the open

Every alert followed for six weeks. Wins and losses, none hidden.

Filings

SEC filings, explained

The section that matters highlighted, with the numbers and what changed.

People

Who holds the company

Insiders, their stake, their buying and selling, and holders above 5%.

03 / Pricing

Free to look. Pro to be alerted.

Free

$0

Look up any stock, the Edge record, filings, people and comments.

Undertow Pro

$6.99 a week

Push alerts for the stocks you follow and the day's strongest setups. 7 days free, cancel any time in the app. Plus tax.