DESY Phone Book vs OperrTel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DESY Phone Book
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The DESY Phone Book offers a staff search with direct contact functions (call, write e-mail, etc.).
OperrTel
This business phone service app provides full mobility for its customers. Manage voice calls, instant messaging, and presence services from your mobile device, effectively carrying your office in your pocket.
- Mobile business phone service
- Voice calls
- Instant messaging
- Presence services
- Office mobility
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The Operrtel App is a business phone service app that enables complete mobility for Operrtel customers. Stay connected when you're away from your office phone, or replace your desk phone altogether when you utilize voice, instant messaging, and presence services from your mobile device. It's like carrying your office in the palm of your hand. Please check our Terms & Conditions: https://www.operrtel.com/terms-of-service.html Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: DESY Phone Book at none against OperrTel's 3. DESY Phone Book also leads on iOS requirement (9.0 vs 13.0). OperrTel's advantage is update cadence (weekly vs every 2 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. OperrTel sells 3 in-app purchases, starting at $0.49 per month. DESY Phone Book asks for nothing beyond the download.
DESY Phone Book ships an update every 2 months, OperrTel weekly. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.
| Parameter | DESY Phone Book | OperrTel |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.4 (7 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 19 MB | 135 MB |
| Age rating | 17+ | 4+ |
| Developer | Deutsches Elektronen-Synchrotron DESY | Operr Technologies, Inc. |
In-app purchases
DESY Phone Book
No in-app purchases
OperrTel
- Monthly Fee$0.491 Month
- Half Yearly Fee$0.996 Months
- Yearly Fee$2.491 Year
Questions
Is DESY Phone Book free?
Is OperrTel free?
Do DESY Phone Book or OperrTel have ads?
Which is updated more often, DESY Phone Book or OperrTel?
Other comparisons
