Evidence A
Laws, standards, official statistics or authoritative guidance.
One real trade-off per episode
Count the cost before you choose.
A practical decision library for everyday choices. Each episode separates the cost, the benefit and the evidence behind the claim.
- Chinese plan
- 599
- Available now
- 20 episodes
- Evidence tiers
- A / B / C
Evidence B
Verifiable through public data, formulas or multiple sources.
Evidence C
Personal experience, a single case or limited observation.
Featured breakdown
Why the “cheap” option can cost more
Break a purchase into price, repairs, replacement and time to compare its real lifetime cost.
Open the decision card
Purchase
Only the start
Maintenance & replacement
+
Time cost
+
True cost
÷ uses
Latest episodes
Start with the most common traps
The hidden cost of a doorbuster price
A very low headline price often shifts money into supplies, repairs, replacement and waiting time.
A free trial is often the entrance to auto-renewal
Free trials and first-month discounts can become fixed monthly costs when cancellation is easy to postpone.
Minimum-spend promotions can increase what you pay
A discount only helps when the extra item was already planned and will actually be used.
Buy one, get one can be the most expensive discount
A lower unit price does not guarantee lower total spending when the second item remains unused.
When the annual pass costs more than monthly
Compare expected use, idle probability and early-exit cost before accepting the annual discount.
How to estimate the repair cost of a cheaper product
Include spare parts, repair delays and replacement frequency when comparing products.
The method
No fear tactics. Just clearer math.
- 01
Name the cost
Purchase, maintenance, replacement, time and opportunity cost.
- 02
Verify the benefit
Replace marketing claims with outcomes that can be observed and reviewed.
- 03
State the evidence
Label A, B or C evidence. Never turn one case into a universal rule.