vs
Ultimatum vs stickK. The stickK alternative for commitments you prove, not just declare.
You set a goal with a time, like getting up or going to the gym, and leave a guarantee: money, your apps or both. Prove it with a photo in time and you lose nothing. If not, you lose it.
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Next
This week
Ultimatum vs stickK. Promising isn't proving.
| Ultimatum | stickK | |
|---|---|---|
| Price | No subscription: you only pay if you don't follow through | $5 for each commitment with money |
| How it's checked | A photo taken on the spot, then checked | You or a friend report it |
| When | At a set time, with a reminder | Periodic reports |
| If in doubt | Someone from the team reviews it | Your referee decides |
| Reminder on time | An alarm that rings even when you're on silent | Reviews: reminders don't arrive |
| If the app fails | Nothing is charged | Reviews: charges while the website was down |
What we learned from stickK's reviews
We're not saying stickK is a bad app. We read what its users dislike so we don't repeat it.
- stickK review★★★★★
“I lost $5 every time I didn’t log in and report that I didn’t do the bad habit, even though the app has no idea whether I’m lying or not.”
US App Store, May 2023
At Ultimatum, you prove it with a photo
- stickK review★★★★★
“…their site is frequently down, leaving you unable to submit your reports (but they will still take your money).”
US App Store, April 2025
At Ultimatum, if the app fails, you don't pay
stickK data from its Spanish App Store listing and its website, October 2026. stickK is a trademark of stickK.com; we're not affiliated with it.
You sign a commitment. And you're the one who checks it.
- Monday
A contract
You commit, full of enthusiasm.
- Wednesday
Reporting on time
You forget to log it and no longer know if it counts.
- Friday
A referee
Your friend stops checking by the second week.
- Now
A commitment needs proof. Ultimatum asks for it on the spot.
How it works. Four steps, every day.
- 1
Step 1 of 2Create ultimatum GoalGo to the gymWhen19:00MondayHow I'll prove itPhoto at the gymDeadline19:30NextPick the goal.
Go to the gym on Monday at 19:00 and prove it with a photo there.
- 2
Step 2 of 2Guarantee €10€0€5€10€20Block apps if I miss it2 apps selected, 3 daysWhat the photo must showMe at the gymCheck locationMy gymCreate ultimatumLeave a guarantee.
Up to €20, your apps or both. If you don't do it, you lose what you chose.
- 3
You're at your gymProve it.
Take the photo at the gym, in the app. You have until 19:30.
- 4Go to the gym, 19:06
Photo confirmed.
You went to the gym, as promised.
€10Nothing is chargedYour apps stay unblockedShareDoneGet your money back.
If you prove it in time. If not, you lose the €10.
Ready to commit?
This is your week when you follow through.
One day, one week or a whole month.
Month-long goalGym October · 3 times a week7/12sessions keptNext: Thursday 19:00Per session€103 daysWeeks
Week 1Week 2Week 3Week 4Goals over several days.
Go to the gym 3 times a week for a month. Every session counts, and you see how you're doing.
Thursday, 9 OctoberMy morning2 of 3 07:00Get upPhoto of breakfast · 07:0207:30Run 5 kmPhoto outside · 07:4109:00Study for 1 hourPhoto of the deskIn 25 minGoals in steps.
A whole morning: get up, go for a run and sit down to study. Each step with its own time.
You choose what's on the line.
Money, from €0 to €20, a few days without the apps you pick, or both. You never lose more than you chose.
Photos as proof.
Taken in the app, with no gallery. The camera checks they're real.
Yesterday, 07:15No photo in time 
Your photoSent at 07:16Think it's a mistake? A person on the team will review it.
Ask a person to review itAcceptA person reviews it.
If you think something went wrong, you dispute it and someone from the team looks at it.
Keep your word, get your money back.
If not, you lose what you put down when you promised. Not a cent more.
Frequently asked questions.
In what matters: you commit and have something on the line. The difference is that on Ultimatum you prove it with a photo taken on the spot, instead of reporting it yourself or through a friend.