# Onebox vs String

The clearest difference is rating: String at 3.5 against Onebox's 3.0. String also leads on review sentiment (69% vs 35%). Onebox's advantage is monetization model (ad-supported vs free with in-app purchases). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

String holds the better App Store score, 3.5 against 3.0. Both are backed by a comparable volume of ratings — 46 and 62 respectively. Written reviews point the same way: 35% of Onebox's written reviews are positive against 69% of String's.

Onebox ships an update every 4 weeks, String every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Onebox | String |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (46 ratings)](https://appshunter.io/ios/app/onebox-virtual-phone-system/id338908820/reviews) | **[3.5 (62 ratings)](https://appshunter.io/ios/app/string-modern-phone-inbox/id1445655431/reviews)** |
| Number of ratings | 46 | **62** |
| Positive reviews | 35.3% of reviews | **68.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 202 MB | 68 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [J2 Web Services, Inc.](https://appshunter.io/developer/1496258416) | [NumberBarn, LLC](https://appshunter.io/developer/1031383867) |

## What reviewers say

### Onebox

[App page](https://appshunter.io/ios/app/onebox-virtual-phone-system/id338908820)

This app provides a virtual phone system for small businesses, enabling VoIP calling, reliable notifications, and smart call handling on mobile devices. It offers enhanced contact management and detailed call logs for better business communication.

**Highlights:** VoIP calling within the app, Reliable push notifications, Enhanced shared contact management, Flexible call routing and handling, Detailed call logs, Voicemail transcription and messaging, Custom greeting for incoming calls

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Fast performance
- 💡 Caller ID customization
- 💡 Call recording feature
- 💡 Faxing capability

**What reviewers complain about**

- 🐛 Frequent crashes
- 🐛 App freezes
- 🐛 Unreliable functionality
- 🐛 Poor call quality
- 🐛 Notification issues

**Reported bugs**

- Outgoing calls not working
- App freezes during calls
- Sound notification not working
- Texting not working or slow
- App doesn't ring phone

**Requested features**

- Email functionality
- Individual extension login
- Improved notification system
- Call transfer feature
- Dark mode


### String

[App page](https://appshunter.io/ios/app/string-modern-phone-inbox/id1445655431)

Enhance customer engagement with a business SMS and voice platform. Organize your inbox, automate responses, and manage contacts efficiently. Send personalized messages to individuals or groups, and access your workflow from any device.

**Highlights:** Use existing or new phone numbers, Organize inbox with sales funnel view, Automated responses and auto-replies, Contact management and CRM integrations, 1-1, group, and mass messaging, Templates and voicemail transcription, Browser and mobile app access

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Onebox free?

Onebox is free to download, with no in-app purchases.

### Is String free?

String is free to download, with no in-app purchases.

### Which has better reviews, Onebox or String?

String is rated higher. Onebox averages 3.0 out of 5 from 46 ratings, while String averages 3.5 from 62 ratings.

### Do Onebox or String have ads?

Neither Onebox nor String shows ads.

### Which is updated more often, Onebox or String?

Onebox ships an update every 4 weeks, and String every 2 months. Most recently, Onebox was updated on October 23, 2026 and String on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*