Delta Theta Lambda vs OPIN (Open+Invitation)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Delta Theta Lambda
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This official Data Theta Lambda App is for members of the chapter to find out about our events, chat with Chapter members, View Chapter Documents, View Chapter Directory, and much more. The ability to effectively communicate with Chapter members will help us continue to develop leaders, promote brotherhood and academic excellence, while providing service and advocacy for our community. The App also allows guest to view many features of the app in the GuestView. Guest can also receive push notifications of Chapter and Community events. As a Guest you can also contact the Brothers, with any questions, or comments. Since its founding on December 4, 1906, Alpha Phi Alpha Fraternity, Inc. has supplied voice and vision to the struggle of African-Americans and people of color around the world. Alpha Phi Alpha, the first intercollegiate Greek-letter fraternity established for African-Americans, was founded at Cornell University in Ithaca, New York by seven college men who recognized the need for a strong bond of Brotherhood among African descendants in this country. The visionary founders, known as the “Jewels” of the Fraternity, are Henry Arthur Callis, Charles Henry Chapman, Eugene Kinckle Jones, George Biddle Kelley, Nathaniel Allison Murray, Robert Harold Ogle, and Vertner Woodson Tandy. The Fraternity initially served as a study and support group for minority students who faced racial prejudice, both educationally and socially, at Cornell. The Jewel founders and early leaders of the Fraternity succeeded in laying a firm foundation for Alpha Phi Alpha’s principles of scholarship, fellowship, good character, and the uplifting of humanity. Alpha Phi Alpha chapters were established at other colleges and universities, many of them historically black institutions, soon after the founding at Cornell. The first Alumni Chapter was established in 1911. While continuing to stress academic excellence among its members, Alpha also recognized the need to help correct the educational, economic, political, and social injustices faced by African-Americans. Alpha Phi Alpha has long stood at the forefront of the African-American community’s fight for civil rights through leaders such as: W.E.B. DuBois, Adam Clayton Powell, Jr., Edward Brooke, Martin Luther King, Jr., Thurgood Marshall, Andrew Young, William Gray, Paul Robeson, and many others. True to its form as the “first of firsts,” Alpha Phi Alpha has been interracial since 1945.
OPIN (Open+Invitation)
Easily share open invitations for local events like garage sales, parties, or pop-up shops. Post your event on an interactive map, set the time, and let nearby users discover it. Users can add events to their calendar with one tap.
- Interactive map of local events
- Post events with location and time
- Discover nearby invitations
- One-tap calendar sync
- Private event invites
- Filter by category and date
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Opin is the easiest way to share open invitations in your community. Hosting a garage sale? Throwing a party? Running a pop-up shop? Drop a pin, set the time, and let people nearby know they're invited. How it works: • Post your event on the map ($1/day) • Share the link or let people discover it nearby • Add to calendar with one tap • Private invites available (hidden from map) Perfect for: • Garage sales & estate sales • Meetups & clubs • Live music & performances • Pop-up shops & markets • Fundraisers & community events • Food trucks • Birthday parties (private mode) • Any open invitation you want to share Features: • Interactive map of local events • Filter by category and date • One-tap calendar sync • Share via SMS, email, or social • Private event invites • No subscriptions — pay only when you post Opin makes it cheap and easy to put yourself on the map. Literally.
Screenshots
Verdict
The clearest difference is in-app purchases: Delta Theta Lambda at none against OPIN (Open+Invitation)'s 1. Delta Theta Lambda also leads on iOS requirement (13.0 vs 15.1). OPIN (Open+Invitation)'s advantage is update cadence (every 8 days vs every 41 months). On price, ads and device support 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
Both are free to download. OPIN (Open+Invitation) sells 1 one-off in-app purchase. Delta Theta Lambda asks for nothing beyond the download.
Delta Theta Lambda ships an update every 41 months, OPIN (Open+Invitation) every 8 days. The most recent releases landed on September 14, 2026 and June 27, 2026 respectively.
| Parameter | Delta Theta Lambda | OPIN (Open+Invitation) |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 41 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 24 MB | 31 MB |
| Age rating | 4+ | 17+ |
| Developer | Ricardo Cumberbatch | Connor Loretz |
In-app purchases
Delta Theta Lambda
No in-app purchases
OPIN (Open+Invitation)
- Post an Opin$0.99





