Make affordable international calls using Wi-Fi or mobile data. Enjoy high-quality conversations with low rates and generous welcome packages. Track your balance, call history, and manage privacy settings easily.
4.2(19 ratings)
Free
Best FRB FlatrateBooster alternatives: apps like FRB FlatrateBooster
10+ similar apps compared and reviewed
4.1 avg rating
10 free apps
Updated October 2026
Looking for something like FRB FlatrateBooster? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.
Top Alternatives to FRB FlatrateBooster
GISTR: International Calls by Syndeo Solutions International Limited
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Make affordable international calls and recharge prepaid mobile phones worldwide. Enjoy a $1 free trial for long-distance calling and explore low-cost options for staying connected globally.
What We Love
- 💰 Cost-efficient calls
- 📞 Clear call quality
- 👍 Easy to use
- 💸 Affordable international calls
- ⚡ Fast customer service
- 💯 Professional service (Israel)
- 🌟 Excellent service
- ✅ Reliable service
- 📱 Great app for iPhone
- 🌐 Good for international calls
Room to Improve
- ❌ App not working
- 🚫 OTP not sending
- 🚫 Cannot sign in with password
- 💸 Scam app
- 💳 Stole money via PayPal
- 📞 App changes number automatically
- 🚫 Cannot access contacts
- 🚫 Cannot see recent calls/favorites
- 💳 Payment issues with PayPal
- 💸 Money not received after top-up
- 🗣️ Calls disconnect mid-conversation
- 🔄 Auto-recharge issues
- 🚫 No free trial/credit
- 💸 Money lost on top-up
- 📉 Calls take long to connect
- 🚫 No access numbers from UK
- 💳 Problems with card/PayPal top-up
- 💥 App crashes frequently
- 📱 App not working on iOS 9.3.1
- 🗣️ Delay in conversation
- 🔒 Sharing customer information
- 🚫 No welcome pack
- 🚫 No local access calls with minutes
- 🚫 No bundles like other VoIP providers
- ❌ Verification fee not refunded
- 🚫 Can't recharge or place a call
