Hippo is a personal CRM built for Apple platforms. Keep notes, events, and to-dos for the friends, family, and colleagues you care about — all stored on your device. No account. No cloud server. No Contacts permission required.
Hippo is a personal CRM for iPhone, iPad, and Mac. A personal CRM helps you keep track of the people in your life the way a sales CRM helps a salesperson track leads — but focused on the relationships that actually matter to you. Friends, family, mentors, colleagues, the people you want to stay close to.
Unlike most personal CRMs, Hippo stores everything on your device. There’s no account to sign up for, no server holding your contacts, and access to your iOS Contacts list is never required (it’s optional, and granted contacts still stay on-device). Optional sync runs through your own private iCloud Drive — never through Hippo.
Hippo is built for people who want to be more attentive without trading their privacy for the privilege.
Make notes, keep track of events and store to-dos for all your contacts.
So next time you meet, a quick glance at the person's profile in Hippo is all you need to remember the details.
Being attentive doesn’t have to be a challenge anymore.
Hippo is your personal reminder.
Use notes to quickly jot down things you learned about your contacts. Like names of kids, new jobs, a promotion, holiday plans, or gift ideas.
Create events for face to face meetings or important life events.
Get reminded when the event is happening so you can ask about it.
Remember the questions you want to ask the next time you meet.
Hippo is the personal CRM that doesn’t want your data.
Monica is a powerful open-source personal CRM, but it’s web-based and requires either a paid hosted plan or self-hosting your own server. Monica’s recent v5 update has shifted the product toward life journaling and modular vaults. If you want a focused personal CRM that runs natively on iPhone, iPad, and Mac with no setup, Hippo is the closer fit.
Dex is a strong choice if your relationships are heavily LinkedIn-driven and you want cross-platform sync via a Dex account. Hippo runs natively on Apple platforms (iPhone, iPad, and Mac) and is built around on-device privacy — your contact data never leaves your device unless you choose to sync via iCloud.
Clay enriches your contacts with public data from across the web. Hippo intentionally doesn’t do this. If you want enrichment, Clay is the right tool. If you want your data to stay local and untouched, Hippo is.
Hippo offers a one-time lifetime purchase option (uncommon in the category) and is the only one that works without ever requesting your iOS Contacts list.
Hi 👋, I’m Roel
I have been struggling with my memory all the time, at work and at home. I used to forget children’s names, someone's job, birthdays, anniversaries and other important life events. At work I couldn’t remember when or how a decision was made.
This made me insecure and unhappy. That is why I built Hippo.
With the Hippo app, I can remember all the important things about the persons I care for. A quick note usually does the job. It is simple and effective … and has changed my life! Hippo has helped me to become a better friend, partner and colleague.
Hippo is free to try for 1 month. After the trial, it’s $14.99 per year or $29.99 as a one-time lifetime purchase.
To view the pricing in your currency, see Hippo in the App Store.
Free to try for one month.
Engineers and manufacturers routinely search for a to access authorized technical sheets for geometric profiles, fit classes, and manufacturing inspection guidelines. Overview of DIN 5464 Scope and Core Purpose
, meaning the torque-transmitting flanks align the parts. However, they can also be designed with diameter centering (internal or external) for higher precision. Evolution: The standard was notably updated in March 2010
Disclaimer: This article is for informational purposes. Standards are updated periodically. Always consult the official DIN 5464 standard PDF for the most current legal and technical requirements before manufacturing or purchasing components.
Heavy-Duty Torque: Understanding the DIN 5464 Standard for Spline Joints din 5464 standard pdf
You can obtain a copy of the DIN 5464 standard in PDF format from various sources:
DIN 5464 HEAVY PROFILE SCHEMATIC _ _ <- Minor Diameter (d) / | \ | | | <- Straight-Sided Flank (0° Pressure Angle) ___| | |___ <- Major Diameter (D) \___|___/ ^ Key Width (B)
If you want, I can:
For the professional engineer, the cost of the standard (usually under $200) is a trivial investment compared to the cost of a product recall caused by using an incorrect or outdated fastener specification. Purchase the official once, and use it as the definitive reference for your high-strength, fine-pitch flanged nut designs.
As DIN standards are copyrighted technical documents, they are generally not available for free legally. You can acquire the official PDF through the following authorized distributors: Beuth Verlag
: A 0° flank angle avoids radial force generation, effectively eliminating hub expansion under high stress. Engineers and manufacturers routinely search for a to
: You can purchase the official full-text PDF through authorized distributors like DIN Media or the Beuth Publishing House .
Because radial forces are virtually eliminated by the straight-sided flank architecture, this standard allows engineers to specify significantly reduced hub wall thicknesses without risking component bursting.
DIN 5464 specifically covers featuring a 0∘0 raised to the composed with power Evolution: The standard was notably updated in March
Note: While DIN 5464 details unique heavy-series geometries, it adopts the underlying inspection and validation procedures defined in DIN ISO 14. Industrial Applications
You can purchase and download the official PDF from several accredited standards distributors:
© 2026 SapphireShore — All rights reserved.
