Zervis vs callever.io
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zervis
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Zer’in akıllı servis takip sistemi Zervis uygulaması, servis araçlarını takip sistemi teknolojisiyle buluşturuyor. Zervis uygulaması ile servisinizin nerede olduğunu harita üzerinden canlı olarak takip edebilir, kendinizi istediğiniz güzergah ve durağa atayabilir, araç ve sürücü bilgilerine anlık olarak erişebilirsiniz. Not: Bu uygulamadan yalnızca Zer ile anlaşmalı şirketler ve çalışanları faydalanabilir.
callever.io
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callever.io — Buy eSIM data plans for 200+ countries and regions. Stay connected while traveling without expensive roaming fees or physical SIM cards. WHY CALLEVER? • 200+ Destinations — Find affordable data plans for countries across Europe, Asia, Americas, Africa and Middle East • Instant Activation — Install your eSIM via QR code or one-tap setup in seconds • Flexible Plans — Choose daily, weekly or monthly plans that fit your travel needs • Unlimited Data Options — Browse worry-free with unlimited daily data plans • Regional Plans — One eSIM for multiple countries in Europe, Asia and more • Secure Payments — Pay safely with credit or debit card HOW IT WORKS 1. Choose your destination country or region 2. Select a data plan that fits your needs 3. Complete payment securely 4. Install eSIM via QR code or one-tap 5. Arrive and connect instantly MANAGE YOUR eSIMs • View active eSIMs and data usage • Track order history • Earn reward points on every purchase • Get support when you need it Whether you're a frequent traveler, digital nomad, or going on vacation — callever.io keeps you connected worldwide at local prices. Download now and never worry about roaming again.
Screenshots
Verdict
The clearest difference is ads: Zervis at none against callever.io's shown. On price, update cadence, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.
| Parameter | Zervis | callever.io |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 91 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Zer A.Ş. | Celal Erat |
In-app purchases
Zervis
No in-app purchases
callever.io
No in-app purchases
