Comparison

Contacts Address Book vs OPSM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Contacts Address Book

This app helps you nurture your personal relationships by reminding you to stay in touch and celebrate important birthdays. It offers a private and offline experience, allowing you to manage contacts and set custom reminders to keep your social circle strong.

Highlights
  • Birthday reminders
  • Keep-in-touch reminders
  • Contact management
  • Offline functionality
  • Customizable notifications
  • Widgets
Features
Read full description

Reminders to keep in touch and remember birthdays. Close personal relationships make life happier, healthier and longer. STORY: Hey everyone, I'm Kai - the guy behind Amicu. It’s great to catch up with someone you care about. But it's not so easy anymore. Your contacts are spread over many places. Mixed with people you don’t know. An avalanche of comments, posts, and texts cluttering everything up. It feels like a chore. No time for the joy of meeting up. And life changes. You move to new places. You change jobs. You travel and meet people, but they're abroad. You join events with cool people. But months of work follow. They stop to appear in feeds and inboxes. Instead of fun reunites relationships fade. I met people, while traveling, living abroad, and volunteering. Not all are on social media. Plus, who likes the distractions, ads, and privacy issues? So I made Amicu. It reminds you to catch up. You decide which people matter. After time reminders show up. Then it's your turn. Meet, call, or be creative. And your contacts should be no one’s business. With Amicu nothing leaves your device. That's it. No spam, privacy-invasion, customer relationships, or feeds. Simple and easy. Ideas, Questions and Feedback: Write to me at kai@amicu.app NOW WITH WIDGETS: • Birthdays today • People you're in touch with • Due contacts • Daily goal BIRTHDAYS: • See upcoming birthdays so you can prepare. • Only shows the birthdays of added contacts. Not every birthday. • Highlights people without birthdays. Never miss an important birthday. • Get notifications a week before and on the birthday. REMINDERS TO KEEP IN TOUCH: • Add reminders how often you want to keep in touch. • Go through your entire contacts fast. One tap per contact. • Contact people using your favorite apps. • Mark many people in touch at the end of the day. • Snooze reminders, when you're busy. • Customizable notifications for reminders • Daily goal to reach out to someone • Custom reminders (premium only) MANAGE CONTACTS: • Amicu Contacts are automatically updated, if the contact book changes. • See contacts without email, phone, address or avatar. • Edit contacts directly in Amicu. STATISTICS: • See the contact frequency for each person e.g. every 2 weeks • Make sure to have enough time for people (premium only) • See how social you're this week and on average (premium only) • Find the right balance of people, reminder frequency and your time PRIVACY AND USABILITY FRIENDLY: • Works completely offline. • No email, password or account. • Keep track without selling your contacts data. • No server means no data breach. • Device Contact access is optional. • Amicu makes money with an optional premium subscription and not your data. • Details at https://amicu.app/privacy LEARN: • Handpicked resources right in the app to get inspired and learn • Curated activities help you to come up with ideas Ideas, Questions and Feedback: Write to me at kai@amicu.app SUBSCRIPTION All features are free besides custom reminders, the time budget and some sorting methods. If you want to support me, Amicu has an auto-renewing premium subscription. ————— Payments are charged to the user’s Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is cancelled at least 24 hours before the end of the current period. The account is charged for renewal within 24 hours before the end of the current period. You can manage and cancel subscriptions in their account settings on the App Store. Terms of Service: https://amicu.app/terms Privacy Policy: https://amicu.app/privacy Support, Questions and Feedback: Write to me at kai@amicu.app

About

OPSM

Features
Read full description

Oil Palm Sustainable farm management (OPSM) mobile app provides a tool kits to facilitate farmers to collect, manage, measure and monitor wide range of real-time data sets, including farm profile and farm daily operation. The information is tailored and enable farmers able to tracks their and help farmers better manage their day-to-day work and future planning activities. Subsequently the farmers will be able to plan, analyse, and improve agricultural processes at a previously unimagined scale. The app is accompanying with Certification Assessment, a self-assessment tool that can be used to determine performance against RSPO criteria. While facilitate more profitable production and promote environmental stewardship.

Screenshots

Contacts Address Book4 screens
OPSM4 screens

Verdict

The call

The clearest difference is in-app purchases: OPSM at none against Contacts Address Book's 4. OPSM also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). Contacts Address Book's advantage is update cadence (every 4 weeks vs every 2 months). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Contacts Address Book sells 3 in-app purchases, starting at $3.99 per month. OPSM asks for nothing beyond the download.

UpkeepUpdate frequency

Contacts Address Book ships an update every 4 weeks, OPSM every 2 months. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
Contacts Address Book versus OPSM: the parameters behind the verdict, then further details
ParameterContacts Address BookOPSM
PriceFreeFree
Rating4.7 (52 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings52 — better—
Update frequencyEvery 4 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size29 MB72 MB
Age rating4+4+
DeveloperKai OelfkeMIMOS Berhad

In-app purchases

3 purchases

Contacts Address Book

Subscriptions3
  • Premium$3.991 Month
  • Premium7 Days trial2 variants$29.991 Year
  • Premium3 Days trial$29.991 Year
None

OPSM

No in-app purchases

Questions

Is Contacts Address Book free?
Contacts Address Book is free to download, with in-app purchases available.
Is OPSM free?
OPSM is free to download, with no in-app purchases.
Do Contacts Address Book or OPSM have ads?
Neither Contacts Address Book nor OPSM shows ads.
Which is updated more often, Contacts Address Book or OPSM?
Contacts Address Book ships an update every 4 weeks, and OPSM every 2 months. Most recently, Contacts Address Book was updated on October 17, 2026 and OPSM on October 5, 2026.

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