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Stop overpaying.
Buy at the right time.

TimeYourBuy tracks Amazon price history so you always know whether today's price is a deal or a ripoff. We analyze months of pricing data to tell you exactly when to buy — and when to wait.

We don't sell products. We don't push you to buy. We just give you the data to make smarter decisions.

How we calculate signals

Our scoring engine compares the current price against a rolling 12-month price history. The score (0–100) reflects how far the current price sits below its historical average, adjusted for category, volatility, and — for commodity categories like Memory and Storage — live market conditions.

Affiliate disclosure

TimeYourBuy participates in the Amazon Associates Program. We earn a small commission when you buy through our links — at no extra cost to you. This is how we keep the site free.

Privacy Policy · Terms of Service

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Privacy Policy

Last updated: May 9, 2026

TimeYourBuy doesn't sell your data, doesn't track you across the web, and doesn't set tracking cookies. We store your email only if you ask us to send you a price alert — and we delete it the moment you unsubscribe.

Here's exactly what that means.

What we collect

Email address — only if you sign up for a price alert. We use it once: to send the alert you asked for. We never sell it, share it, or send you anything else.

Anonymous usage analytics — we use Umami, a privacy-respecting analytics tool hosted on Umami Cloud. It records page views, referrer, browser type, and operating system in aggregate. No cookies. No fingerprinting. No cross-site tracking. No personal identifiers. Data is kept for 12 months, then deleted.

Search queries — the searches you run on the site are logged so we can improve product matching. They are not linked to your email or any personal identity.

What we don't collect

• Payment information — we don't process payments
• Advertising or tracking cookies of any kind
• A behavioral profile of you
• Anything we'd need in order to sell your data, even if we wanted to

Price alerts

When you register an alert, we store two things: your email and your target price. When the price hits your target, we send one email. That's it.

Every alert email includes an unsubscribe link that immediately deactivates your alert. We also send a List-Unsubscribe header so Gmail and other email clients can offer a one-click unsubscribe button. If you don't unsubscribe and your alert sits unused for 12 months, we delete it.

Amazon affiliate links

TimeYourBuy participates in the Amazon Associates Program. When you click through to a product, Amazon may set its own cookies under their privacy policy — we have no control over that. We earn a small commission on qualifying purchases at no extra cost to you. This is what keeps the site free.

Cookies

We don't set any first-party tracking cookies. Umami, our analytics tool, is cookie-free by design.

Data retention

• Alert data: deleted when the alert fires, when you unsubscribe, or after 12 months of inactivity — whichever comes first.
• Analytics data: kept in anonymous, aggregate form for 12 months, then deleted.

Your rights (GDPR / CCPA)

Depending on where you live, you may have the right to:

• See the data we hold tied to your email
• Delete all of it
• Opt out of any future emails (the unsubscribe link in any alert does this immediately)

Email timeyourbuy@gmail.com to exercise any of these rights. We respond within 30 days.

Contact

Questions, concerns, or you spotted something we should fix? Email timeyourbuy@gmail.com.

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Terms of Service

Last updated: April 8, 2026

By using TimeYourBuy, you agree to these terms. If you don't agree, please stop using the site.

What TimeYourBuy is

TimeYourBuy is a price intelligence tool. We track publicly-available Amazon pricing data and provide buy/wait signals based on historical price analysis. We are not a retailer, marketplace, or financial advisor.

No purchase guarantees

Prices and availability change constantly. Our signals represent our best analysis of historical data — they are not guarantees of future pricing. Always verify the current price on Amazon before purchasing.

Accuracy of information

We do our best to keep price data accurate and up to date. However, prices are sourced from third-party data providers and may not reflect real-time availability or seller-specific pricing.

Affiliate relationships

TimeYourBuy participates in the Amazon Associates Program. We earn a commission on qualifying purchases made through our links. This does not affect the integrity of our buy signals — we score products objectively based on price history.

Acceptable use

You may use TimeYourBuy for personal, non-commercial use. You may not scrape, copy, or redistribute our price data or signals in bulk without written permission.

Limitation of liability

TimeYourBuy is provided "as is". We are not liable for any purchasing decisions made based on our signals. Always do your own research before making a purchase.

Changes

We may update these terms from time to time. Continued use of the site constitutes acceptance of any changes.

Contact

Questions? Email us at timeyourbuy@gmail.com.

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How Our Signals Work

Here's exactly how we calculate buy and wait signals, and how well they actually performed when we tested them.

How we calculate the score

Every product gets a score from 0 to 100. The score combines four things:

What we look at	Weight	What it tells us
Price vs. its 12-month range	35%	Is today's price near the low or near the high? Lower = better deal
Time of year	25%	Does this category usually drop in price this month?
Recent direction	20%	Has the price been moving up or down over the last 30 days?
How fresh the deal is	20%	Did the price just drop, or has it been at this level for a while?

The score becomes a signal: STRONG BUY (80–100) · BUY (60–79) · FAIR (40–59) · WAIT (20–39) · STRONG WAIT (0–19). When we have less price history for a product, we show a lower confidence number so you know the signal is less certain.

How well do the signals actually work?

To check our signals, we set aside 20% of our data and ran the algorithm on it as if we were seeing it for the first time. A buy signal is "right" when the price doesn't drop sharply afterwards — meaning you didn't miss a better deal. A wait signal is "right" when the price does drop — meaning waiting saved you money. We measure each two ways: looking at the price exactly 30 days later, and looking at the lowest price seen during those 30 days.

Buy signals

A buy signal is "right" if you didn't miss a better deal — i.e., the price didn't drop more than 5%.

Signal	Price didn't drop by day 30	Price never dropped in 30 days	Avg price change	How many cases
STRONG BUY	88.4%	73.6%	+18.7%	12,477
BUY	80.9%	58.5%	+6.4%	29,629

"Held throughout" is the stricter test — it catches cases where a cheaper price appeared briefly even if the price recovered by day 30. For comparison: always buying immediately would pass the strict test 50% of the time.

Wait signals

A wait signal is "right" if a cheaper deal appeared — i.e., the price dropped at least 5% (it doesn't measure whether prices rose).

Signal	Price dropped by day 30	Price dropped at some point in 30 days	Avg price change	How many cases
WAIT	35.7%	64.2%	−4.7%	39,935
STRONG WAIT	57.9%	84.4%	−14.5%	896

"Dropped at some point" is more lenient because a price can briefly dip and then recover. For comparison: always waiting would catch a drop at some point 50% of the time, and random guessing ≈ 40%. FAIR signals (29,026 cases) had an average price change of +0.9% — neither a clear buy nor a clear wait.

Does our confidence number actually mean anything?

When we say a signal is "75% confident," is it actually right 75% of the time? Below, we plotted what we predicted against what actually happened. Dots close to the dashed line mean our predictions matched reality. Dots far from the line mean we were over- or under-confident.

On average, our STRONG BUY confidence was off by 2.6 percentage points across 12,477 cases. BUY was off by 1.2 across 29,629 cases. Both are well within the range we'd consider reliable (under 5 points). Based on our test set, looking 30 days ahead.

What about products that got discontinued?

Our catalog is products that are still on Amazon today. Products that disappeared — often after a fire-sale discount — aren't in our data, which could make our results look better than they really are. To check, we compared two groups in our test set: products that are still being sold, and products that got pulled off Amazon afterwards.

Signal	Still selling	Later removed	Difference
STRONG BUY	73.7%	72.5%	−0.1 pts
BUY	58.6%	57.1%	−0.1 pts
WAIT	64.4%	62.5%	−0.1 pts

The gap is tiny — under 0.2 percentage points for every signal. STRONG WAIT showed a slightly bigger gap (+0.3 points), but only 18 discontinued products fell into that bucket, so the difference isn't meaningful.

Where our signals fall short

• Discontinued products — our data is mostly products still on Amazon today. Products that got removed are underrepresented, so our success rates may be slightly higher than reality.
• Pricing assumptions — our test assumes prices tend to bounce around an average. For memory and storage products, prices follow industry-wide trends, which the test doesn't fully capture (the live system handles this separately).
• What we track — we cover ~10,000 products, mostly consumer electronics. Our results apply to that catalog, not all of Amazon.
• Stable-price products — our results focus on products whose prices change at least a few times a month. Products with rarely-changing prices weren't included in this test.
• Data source — all our price history comes from Keepa, which records prices only when they change. For products with stable prices, we have fewer data points to work with — we account for this by lowering the confidence shown to you.

Questions or feedback?

Email timeyourbuy@gmail.com. If something here is unclear or you spot a problem, please let us know.