credit cards: trial clock and card-on-file (2026-08-27)

Compare Card times the trial clock and card-on-file trap for “amex cards” in credit cards on 2026-08-27 across Nubank, Inter, and C6 Bank. Focus: credit cards. Annual is blocked until day-8 charging is written, not guessed.

Trial clock sheet — card-picks-2026 2026-08-27

Field	Nubank	Inter	C6 Bank
Card required?
Trial days
First charge $
Pause without chat?
credit cards
Annual allowed?

How Nubank, Inter, and C6 Bank fail the clock

Nubank fails if the card is hidden until the last hour. Inter fails if credit cards dies when the trial ends. C6 Bank is the control: if its day-8 price is missing, stop.

Fails that kill card-picks-2026-trial-2026-08-27

• Starting Nubank trial without a day-8 date
• Ignoring the card screen on Inter
• Skipping credit cards because the trial felt long
• Letting C6 Bank auto-convert overnight

Go / no-go 2026-08-27

Annual only if the trial clock, card-on-file, and day-8 USD price are written for “amex cards”. Otherwise card-picks-2026 stays monthly until credit cards survives day 8.

Start the trial without pretending the card is optional

On Nubank, write whether a card is required, the trial length in days, and the first USD charge date. A “free” badge on 2026-08-27 is not a clock.

On Inter, write whether a card is required, the trial length in days, and the first USD charge date. A “free” badge on 2026-08-27 is not a clock.

On C6 Bank, write whether a card is required, the trial length in days, and the first USD charge date. A “free” badge on 2026-08-27 is not a clock.

What happens at hour 36 after the trial

Run real cashback on Nubank: simulate 3 categories from your statement. If the product converts to paid without a second click, freeze annual. credit cards must still work on the free day.

Run card exit on Inter: note cancel window and any penalty. If the product converts to paid without a second click, freeze annual. credit cards must still work on the free day.

Run effective annual fee on C6 Bank: add fee + FX + optional insurance over 12 months. If the product converts to paid without a second click, freeze annual. credit cards must still work on the free day.

Forty-eight-hour trial lab

A vendor owner in Fort Wayne started Nubank at 36h local, set a calendar alert for day 6, and screenshotted the card screen. If support cannot pause the clock, Compare Card stays monthly on 2026-08-27.

A vendor owner in Fort Wayne started Inter at 36h local, set a calendar alert for day 6, and screenshotted the card screen. If support cannot pause the clock, Compare Card stays monthly on 2026-08-27.

A vendor owner in Fort Wayne started C6 Bank at 36h local, set a calendar alert for day 6, and screenshotted the card screen. If support cannot pause the clock, Compare Card stays monthly on 2026-08-27.

Lab exclusive to card-picks-2026 (2026-08-27)

card-picks-2026-trial-2026-08-27 in Fort Wayne: a vendor owner at Compare Card measured credit cards in USD ($) on a 36h clock. The query “amex cards” does not replace this lab.

card-picks-2026-trial-2026-08-27 does not reuse copy from another language or from another slug in the same niche. This page answers only card-picks-2026-trial-2026-08-27.

card-picks-2026-trial-2026-08-27 step 1 at 36:10: on Nubank, effective annual fee — add fee + FX + optional insurance over 12 months. File the screenshot next to credit cards.

card-picks-2026-trial-2026-08-27 step 2 at 36:11: on Inter, real cashback — simulate 3 categories from your statement. File the screenshot next to credit cards.

card-picks-2026-trial-2026-08-27 step 3 at 36:12: on C6 Bank, card exit — note cancel window and any penalty. File the screenshot next to credit cards.

card-picks-2026-trial-2026-08-27 till rule: the charged USD total counts; the homepage number does not. Nubank vs Inter vs C6 Bank at the same local time in Fort Wayne.

card-picks-2026-trial-2026-08-27 exit: if cancel, export, or credit cards fail this lab, Compare Card stays monthly on 2026-08-27 even if “amex cards” is rising.

card-picks-2026-trial-2026-08-27 trial x0 Nubank real cashback credit cards Fort Wayne 36 $.

card-picks-2026-trial-2026-08-27 trial x1 Inter card exit credit cards Fort Wayne 37 $.

card-picks-2026-trial-2026-08-27 trial x2 C6 Bank effective annual fee credit cards Fort Wayne 38 $.

card-picks-2026-trial-2026-08-27 trial x3 Nubank real cashback credit cards Fort Wayne 39 $.

card-picks-2026-trial-2026-08-27 trial x4 Inter card exit credit cards Fort Wayne 40 $.

card-picks-2026-trial-2026-08-27 trial x5 C6 Bank effective annual fee credit cards Fort Wayne 41 $.

card-picks-2026-trial-2026-08-27 trial x6 Nubank real cashback credit cards Fort Wayne 42 $.

card-picks-2026-trial-2026-08-27 trial x7 Inter card exit credit cards Fort Wayne 43 $.