# Tresta vs String

The clearest difference is review sentiment: String at 69% against Tresta's 17%. String also leads on ratings volume (62 vs 12) and device support (3 vs 1). Tresta's advantage is rating (4.7 vs 3.5) and monetization model (free vs free with in-app purchases). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Tresta holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: String has 62 ratings behind it against 12, so its average is the more settled of the two. Written reviews complicate that: 17% of Tresta's written reviews are positive against 69% of String's, so the app with the better star average is not the one people write more warmly about.

Tresta ships an update every 4 weeks, String every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Tresta | String |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (12 ratings)](https://appshunter.io/ios/app/tresta/id1207868583/reviews)** | [3.5 (62 ratings)](https://appshunter.io/ios/app/string-modern-phone-inbox/id1445655431/reviews) |
| Number of ratings | 12 | **62** |
| Positive reviews | 17.0% of reviews | **68.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 38 MB | 68 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tresta](https://appshunter.io/developer/1181024586) | [NumberBarn, LLC](https://appshunter.io/developer/1031383867) |

## What reviewers say

### Tresta

[App page](https://appshunter.io/ios/app/tresta/id1207868583)

This business phone system offers unlimited calling and texting on a dedicated business number, accessible from your smartphone. It provides essential collaboration features to enhance your company's professional image and communication capabilities.

**Highlights:** Unlimited calling, Unlimited texting, Business phone number, Collaboration features, Mobile accessibility

**In-app purchases:** none

**What reviewers like**

- 👍 Phenomenal customer service
- 👍 Great app and texting capabilities
- 👍 Works well for business line
- 👍 Auto attendant feature
- 👍 Text from business number

**What reviewers complain about**

- 🐛 App is slow and a pain to use
- 🐛 Text messages no longer show up
- 🐛 Bug after bug, can't get code together
- 🐛 Error message pops up 50% of the time
- 🐛 Can't make calls until force quit

**Reported bugs**

- Text messages no longer show up
- Error message pops up 50% of the time
- Can't make calls until force quit
- Phone locks/shuts off when listening to recordings
- Buggy and often non-responsive iPhone app

**Requested features**

- Make it possible to have a contact list within the Tresta app
- Faster response time between multiple tabs
- Add dark mode option
- Improve UI to look more like a phone service
- Ability to block harassment numbers


### 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 Tresta free?

Tresta 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, Tresta or String?

Tresta is rated higher. Tresta averages 4.7 out of 5 from 12 ratings, while String averages 3.5 from 62 ratings.

### Do Tresta or String have ads?

Neither Tresta nor String shows ads.

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

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

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