Fast Customer vs OS3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fast Customer
This app eliminates the need to wait on hold when contacting customer service. Simply tap a button, and the app will call you back when a representative is available.
- Eliminates waiting on hold
- Callback feature
- Contact customer service
- User-friendly interface
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While waiting on hold in early 2011, we thought, "Why am I waiting on hold? Why can't I just tap a button and get a call when someone's ready to talk to me? A world without hold. Can you imagine? So after several late nights building FastCustomer, we landed in Bayou Bakery in Arlington, VA to make a test call to AT&T. WOULD IT WORK?! HECK YES IT WOULD! With a tap followed by a few minutes sipping coffee, FastCustomer was taking its first steps to eliminate "waiting on hold" from all our lives. When our phone rang moments later and an AT&T rep was ready to help, we knew that contacting customer service would never be the same again. WHICH WAS AWESOME. Hundreds of thousands of delighted users later, we're still passionate about making customer service better for everyone.
OS3
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OS3 is a voice assistant built for Apple Watch. Talk to it like you would a friend, no tapping, no typing, just your voice. How it works: 1. Raise your wrist and start talking. OS3 listens, thinks, and responds out loud entirely hands-free. 2. Conversations feel natural with real-time voice powered by Google's Gemini AI. 3. Live captions appear on screen as you speak and as OS3 responds. Features: 1. Voice first interaction designed for the small screen, concise answers, no clutter. 2. Conversation history: revisit past conversations and pick up where you left off. 3. A visual orb that animates as OS3 listens and speaks. 4. iOS companion app for managing your account, viewing usage, and subscription details. 5. Sign in with Apple for quick, private authentication. OS3 requires an active internet connection on Apple Watch. An iPhone with the companion app installed is needed for account setup. Terms of Use: https://os3.app/terms/
Screenshots
Verdict
The clearest difference is in-app purchases: Fast Customer at none against OS3's 1. Fast Customer also leads on iOS requirement (8.0 vs 18.0). 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. OS3 sells 1 in-app purchase, starting at $12.99 per month. Fast Customer asks for nothing beyond the download.
| Parameter | Fast Customer | OS3 |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | — | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 8.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 7 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | FastCustomer, Inc. | QR LLC |
In-app purchases
Fast Customer
No in-app purchases
OS3
- OS3 Pro$12.991 Month
