NoJar
How wrong are you about people
Only for iPhone
Free · In‑App Purchases
iPhone
Find out how wrong you are about people. Predict each ask, log what happens, and after 15 asks see the gap in your own numbers. No account, no analytics, no subscription.
You think people will say no. You are probably wrong — and you have never measured it.
NoJar is a 30-day self-experiment. Before each ask, you lock in a prediction: the chance they say yes, from 0 to 100%. Afterwards, you log what actually happened. Predictions are immutable once saved — that is what keeps your data honest. After 15 resolved asks, NoJar shows you the gap between what you predicted and what people actually said. Not a study. Your own numbers.
THE SCORE IS INVERTED
Your weekly target is rejections collected, not asks made. A yes is a miss. The quota only moves on a no. Removing the failure state is what removes the avoidance.
PREDICT, ASK, RESOLVE, CALIBRATE
— Write the ask and lock in your prediction before you go
— Resolve it after: they said yes, they said no, or you chickened out
— A no scores. Confetti included
— A dodge is never shamed. Logged. That's data too
YOUR CALIBRATION, MEASURED
— A plain-language headline: what you predicted on average against how often people said yes
— A reliability chart of predicted probability against real outcomes
— An accuracy score with a trend against your last stretch of asks
— Your dodge rate by predicted probability — the chart that shows where your nerve actually breaks
The app also states its own limits: self-selected asks are not a random sample, and the screen says so.
128 CURATED ASKS
Four difficulty tiers, from asking a café for tap water to asking your manager for a raise. No stunts, no pranks, nothing that pressures anyone or targets people who can't decline freely.
A FINISH LINE, NOT A TREADMILL
NoJar is a 30-day programme. On day 30 you get a report: total asks, no's collected, dodge rate, calibration drift week by week, and the successful ask you rated lowest — the one that mattered. Shareable as an image. After that, the app keeps working but stops nagging. No daily streaks, ever.
PRIVATE BY ARCHITECTURE
No account. No sign-up. No server. No analytics or tracking of any kind. Your asks — which are often personal — stay in a protected store on your device. App Store privacy label: Data Not Collected.
ONE PAYMENT, NO SUBSCRIPTION
Free to try: log up to 10 asks and browse the first two tiers of the library. A single one-time purchase unlocks unlimited asks, the full calibration screen, the Day 30 report, every library tier, and CSV export of your data.
Three quiet notifications, all optional: a reminder to resolve open asks, a week-close note if the quota isn't met, and one when your Day 30 report is ready. NoJar never tells you to go be brave.
Not a treatment: NoJar is a curiosity experiment. If asking things causes you real distress, a therapist is a better tool than an app.
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Built with love for the Apple ecosystem. Native SwiftUI.
Questions or feedback? We'd love to hear from you.
https://nojar.kos.codes/support
Terms of Use:
https://nojar.kos.codes/terms
Privacy Policy:
https://nojar.kos.codes/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Michal Kos, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Michal Kos
- Size
- 3.6 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock everything $5.99
- Copyright
- © 2026 Michal Kos