Leap37
Know when to stop & choose
Free · Designed for iPad. Not verified for macOS.
Apartment, job, car, or date? Leap37 uses the 37% rule to tell you exactly when to stop looking and commit — by count or by time. Works offline; sign in to sync.
Some choices come at you one at a time — apartments, job candidates, used cars,
even dates — and once you pass on one, it's usually gone. Search too little and
you settle; search too long and the best option slips away. Leap37 solves this
with a result from mathematics called the 37% rule (the "secretary problem").
THE RULE, MADE SIMPLE
Look at the first ~37% of your options without committing — just learn the
field. Then leap: commit to the first option that beats everything you saw while
looking. That strategy gives you the mathematically best shot — about a 37%
chance — at landing the single best option.
WHAT'S INSIDE
• Calculator — Enter how many options you'll see, or a time horizon (days,
weeks, months, years), and instantly get your look/leap split.
• Decisions — Track real options as you go. Leap37 sets your benchmark from the
looking phase and tells you the moment you should commit.
• Templates — 25+ ready-made scenarios across home, career, business, dating,
shopping, travel, and services. Tap one to start in seconds.
• Time horizons — Some decisions play out over years, not items. "Dating for 20
years" → explore for the first ~7.4 years, then commit. Leap37 does the math.
• Learn — Plain-English explanation of why 37%, when it applies, and how the
same idea works for any variable: time, number of options, money spent,
distance traveled, interviews, deals, and more.
• Optional cloud sync — Sign in with Apple or Google to back up your decisions
and keep them in sync across your iPhone and iPad. Totally optional.
PRIVACY FIRST
Leap37 works without an account and keeps your decisions on your device. Signing
in (Apple or Google) is optional — if you do, your decisions sync across your
devices and back up to the cloud, and you can delete your account and that data
anytime. Leap37 is free and supported by non-personalized ads (Google AdMob); we
don't use other analytics and don't track you across other apps. Read the full
Privacy Policy at https://leetsyplakov.github.io/Leap37-policies/privacy.html.
Leap37 is an independent app and offers general decision-making guidance only —
not professional, financial, legal, or medical advice.
Ratings & Reviews
Version 1.3
• Leap37 is now free and ad-supported, which keeps development going. Ads are
non-personalized — we don't track you across other apps.
• Everything you rely on is unchanged: the calculator, templates, decision
tracking, Learn, and optional cloud sync all work exactly as before.
• Performance and stability improvements.
(Prior — Version 1.2: optional Sign in with Apple/Google for cloud backup & sync,
in-app feedback, expanded Learn with sources, and in-app account deletion.)
The developer, Andrey Lee Tsyplakov, 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 Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Andrey Lee Tsyplakov
- Size
- 8.7 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Andrey Lee Tsyplakov