FastCaller vs Diamy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FastCaller
This app offers a smart T9 dialer for instant contact search. Quickly find and call contacts with minimal taps by typing any part of their name or number. It features a clean interface and supports multiple languages for efficient communication.
- Smart T9 keyboard for contact search
- Search by name or number (partial)
- Multi-language support
- Quick call via long-press
- Recent calls prioritized
- Clean and simple interface
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FastCaller Smart T9 Dialer for Instant Contact Search FastCaller helps you find and call contacts quickly with fewer taps. Just start typing — you don't need the full name or number. The built-in T9 keyboard matches results instantly using any part of the name, surname, or phone number. The search engine is fast and accurate, designed to get you to the right contact with minimal effort. - T9 keyboard with smart contact search - Works with both names and numbers, even partial ones - Supports multiple languages with matching character sets - Long-press to quickly call a contact - Recent calls stay on top for faster redial - Taptic feedback when the call connects (when dialing from the app) - Simple, clean interface with no clutter FastCaller is made for users who want speed and efficiency in everyday calling.
Diamy
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IMPORTANT: DIAMY REQUIRES A SUBSCRIPTION FROM A COMPATIBLE INTERNET TELEPHONY SERVICE PROVIDER Please contact your VoIP services supplier for asking additional information to know if it is compatible with services offered by Diamy and if you have an active account. *** This app is still being developed. You may experience instabilities and bugs *** Diamy is an app devoted to your enterprise telephony. MAIN FEATURES : - VoIP calls - Check your visual voicemail - Change your voicemail personal’s greeting - Setup your call forwards to another phone of your company or to an external number - Add your favorite colleagues to your personal dashboard and see when they are in a call ADMINISTRATIVE FEATURES : - Update your company opening hours - Open and close your company after official hours - Activate the dedicated call scenario for vacations and holidays - Control and update your company holidays - Add and remove members to your company’s Dial Groups
Screenshots
Verdict
The clearest difference is in-app purchases: Diamy at none against FastCaller's 4. Diamy also leads on ads (none vs shown) and device support (4 vs 2). FastCaller's advantage is update cadence (every 2 months vs every 10 months). On price and iOS requirement 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. FastCaller sells 4 in-app purchases, starting at $0.99 per month. Diamy asks for nothing beyond the download.
FastCaller ships an update every 2 months, Diamy every 10 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.
| Parameter | FastCaller | Diamy |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (18 ratings) — better | — |
| Number of ratings | 18 — better | — |
| Update frequency | Every 2 months — better | Every 10 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 40 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Bekas | W3TEL |
In-app purchases
FastCaller
- No ADs & Quick Dial monthly$0.991 Month
- No ADs & Speed Dial yearly$9.991 Year
- Remove Ads$0.99
- Unlock Quick Dial$0.99
Diamy
No in-app purchases









