Operation World vs Adjace
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Operation World
Join a global prayer movement with this comprehensive prayer handbook. Receive daily country prayer reminders, research statistics, and read detailed prayer requests and praise reports for every nation. This app is a trusted resource for Christians worldwide.
- Daily country prayer reminders
- Country statistics research
- In-depth prayer requests
- Praise reports for each country
- Global prayer movement participation
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Want to join the global prayer movement? Operation World (OW), the definitive global prayer handbook, has been used by more than a million Christians to pray for the nations. Now as a mobile app you can receive reminders to pray for the “country of the day,” research statistics on each country and read the in-depth prayer request and praise reports given for each country of the world. OW is widely regarded as the definitive volume of prayer information about the world and is the recipient of the ECPA Gold Medallion Award for Excellence in Evangelical Christian Literature. OW has had seven editions published. The most recent is from 2010, which is a complete update of the 21st century edition, released in 2001. The previous edition was published in 1993. The original edition was produced in 1964, from South Africa, and was only 32 pages of basic information about 30 countries. OW has been translated into several other languages: German, Spanish, Portuguese, French, Korean, Chinese, Russian, and in part into Indonesian and Italian. The cumulative number of copies printed in all languages exceeds 2 million. The 7th edition was released in October of 2010. OW listed in Christianity Today's The Top 50 Books That Have Shaped Evangelicals, Landmark titles that changed the way we think, talk, witness, worship, and live.
Adjace
Access your church's directory easily from your phone. Update your profile with current contact information and view church celebrations like birthdays and anniversaries. Stay connected with your congregation on the go.
- Scrollable directory
- Clickable pictures
- Update profile information
- View birthdays and anniversaries
- Mobile church presence
- Easy access to information
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Adjace is a convenient way to access your church’s directory right from your phone. The simple feel and flow of the app make it easy to find the information you need. Adjace gives your church a presence on the mobile platform. With the mobile directory, you can get to your church’s congregation from anywhere. Update your profile to make your phone numbers, emails, and addresses current. Features: - Scrollable directory - Clickable pictures - Access others' and update your own birthdays, email addresses, phone numbers, and more! - Ease of access to find the information you need - Check out your church's celebrations and see when the next birthday or anniversary is coming up Download Adjace to connect with your church!
Screenshots
Verdict
The clearest difference is review sentiment: Operation World at 86% against Adjace's 40%. Operation World also leads on rating (4.5 vs 3.1) and ratings volume (50 vs 9). Adjace's advantage is iOS requirement (9.0 vs 15.0). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Operation World holds the better App Store score, 4.5 against 3.1. That said, the two scores are not equally well evidenced: Operation World has 50 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 86% of Operation World's written reviews are positive against 40% of Adjace's.
Operation World ships an update every 3 months, Adjace every 2 months. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.
| Parameter | Operation World | Adjace |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (50 ratings) — better | 3.1 (9 ratings) |
| Positive reviews | 85.7% of reviews — better | 40.0% of reviews |
| Number of ratings | 50 — better | 9 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 54 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Johnathan Pulos | Adam Patrick |
Customer experience
Operation World
Adjace
In-app purchases
Operation World
No in-app purchases
Adjace
No in-app purchases







