How we review
Where the numbers come from, and what they are not.
The short version
Our system analyzes published specs and owner feedback to calculate comparisons. Every score is aggregated from public sources; none comes from hands-on use.
Seller pages
Owner feedback
4–5 criteria, each 1–10
needs ≥ 4 criteriaAverage of up to 3 pools
needs ≥ 2 poolsAverage of the two, to one decimal
Compared only inside one subcategory
Only when a subcategory has ≥ 8 scored brands
Tap the ring
Every score on Tech Busy is three rings in one. Tap a ring to see what feeds it.
Overall = Social + Usability, halved
Average of the two, to one decimal. It only exists when both do.
Social: what owners say in public
Up to three pools. A pool counts for less when it has few reviews or mostly old ones, so the result isn’t always the plain average.
Usability: what the seller publishes
Each criterion is scored 1–10 against written anchors, using only the seller’s own pages.
Usability score
Four or five criteria per product type, each scored 1 to 10 against written anchors, using only what the seller publishes.
Seller pages only
Published specs, terms and warranty pages.
4 or 5 criteria
Picked per product type, each with written anchors for 1 to 10.
No score under 4
A brand needs at least four criteria to get a score.
Where Tamron 28-75mm F/2.8 Di III VXD G2 for Sony E landed on the 1–10 scaleUsability 8.2 · checked Nov 14, 2026
Overall score and rank
Ranks compare brands inside one subcategory, never across the whole site.
Top of Cameras on Tech Busy
Brand scores in Cameras, best first, from the live site. Tamron 28-75mm F/2.8 Di III VXD G2 for Sony E shows “#1 of 15 products in Cameras”.
When does a “best” list appear?
Only when a subcategory has at least eight scored brands. Drag to try it. EXAMPLE
Not scored
When there isn’t enough published information or owner feedback, the page says “Not scored” and why.
Brand name · Not scored
We don’t guess.
No score is better than a made-up one. The page says why it’s missing.
Claims we checked
Each review lists a few seller claims and what we found. Each has a source and a date. Guess first, then tap.
6-year limited USA warranty
The Tamron USA product page states a 6-year limited warranty at no additional charge.
Moisture-resistant construction
Tamron's FAQ says it is not waterproof and should be protected from heavy or prolonged moisture.
Real claims from the Tamron 28-75mm F/2.8 Di III VXD G2 for Sony E review, with their sources.
Money and AI
Two questions people ask. Two short answers.
Brands can’t pay for a score or a rank
Commissions never change either.
AI helps. A person decides.
AI helps with research and drafting. A person reviews what is published.
What else you’ll see on a review
Built from the same public data.
Real cost
Sticker vs real price, by years kept.
Buyer’s Remorse Meter
Owner regret: Low, Medium or High.
Skip it if…
Is it for you? 3 taps.
Compare before you pay
Side by side: scores, 2-year cost.
Coupon by email
Confirm first. Sent by EmailerPros.
Claims we checked
Seller claims with a source and a date.
More on how we review
Which products we pick, when a list appears, and what the dates mean.
Which products we review
For each brand we review its main products: one when a brand sells a single product or service, up to three for most brands, and never more than five, even for the biggest. We take one product per product line (sizes, colours and bundles count as one), starting with the line’s flagship or best seller, then the products with the most independent owner reviews and the most searches. Accessories, refills and spare parts are left out.
A brand page lists the products we reviewed, and its other products under “Also sells”, without a score.
Rankings
A “best” list ranks the best-scoring product of each brand, so a brand appears once. We publish a list only when at least eight brands in a subcategory are scored: the top 3 at 8 to 14 brands, the top 5 at 15 to 29, and the top 10 at 30 or more.
Sources and prices
Every criterion, owner-feedback pool and checked claim has its source. Prices come from the brand’s own site, with the date we saw them; prices change, so check the seller’s page before you buy.
Dates
The “Updated” date is the day we last checked a review’s sources, not the day the page was edited.
Social score
The average of up to three pools of public owner feedback. A brand needs at least two pools.
Independent web and YouTube
8.8Marketplace reviews
9.4Why some pools count for less EXAMPLE
All three pools count fully.
Not counted: reviews on a brand’s own site
We don’t count reviews shown on a brand’s own site.
Paid creator? We say so
When a creator was paid, the review tells you.