# Secnum vs String

The clearest difference is review sentiment: String at 69% against Secnum's 18%. String also leads on rating (3.5 vs 2.1) and in-app purchases (none vs 17). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Secnum sells 12 in-app purchases, starting at $2.99 per month. String asks for nothing beyond the download.

String holds the better App Store score, 3.5 against 2.1. That said, the two scores are not equally well evidenced: String has 62 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 18% of Secnum's written reviews are positive against 69% of String's.

Secnum ships an update every 4 months, String every 2 months. The most recent releases landed on September 22, 2026 and July 25, 2026 respectively.

## The numbers

| Metric | Secnum | String |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (9 ratings)](https://appshunter.io/ios/app/secnum/id1215632082/reviews) | **[3.5 (62 ratings)](https://appshunter.io/ios/app/string-modern-phone-inbox/id1445655431/reviews)** |
| Number of ratings | 9 | **62** |
| Positive reviews | 18.2% of reviews | **68.6% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 68 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cellact](https://appshunter.io/developer/1215632081) | [NumberBarn, LLC](https://appshunter.io/developer/1031383867) |

## What reviewers say

### Secnum

[App page](https://appshunter.io/ios/app/secnum/id1215632082)

Get a secondary Israeli mobile number on your existing SIM card for calls and texts. Manage your numbers with features like call forwarding and voicemail transcription. Subscription plans available for SMS and voice minutes.

**Highlights:** Secondary Israeli mobile number, Make and receive calls, Send and receive SMS, Port existing number, Voicemail transcription, Call forwarding, Block list

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Landline Monthly 500 MIN | $2.99 | per month |
| Monthly 500 SMS only | $3.99 | per month |
| Monthly 120 Plan | $4.99 | per month |
| Monthly 120 SMS/MIN | $4.99 | per month |
| Monthly 500 SMS + 500 minutes | $5.49 | per month |
| Monthly Calls & SMS | $6.49 | per month |
| Monthly 1500 SMS/MIN | $6.99 | per month |
| Monthly Calls & SMS | $8.99 | per month |
| Monthly 120 MIN/SMS | $9.99 | per month |
| Monthly 1000 SMS/MIN | $14.99 | per month |
| Premium service for 1 month | $7.99 | one-time |
| Replace current number | $9.99 | one-time |


### 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 Secnum free?

Secnum is free to download, with in-app purchases available.

### Is String free?

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

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

String is rated higher. Secnum averages 2.1 out of 5 from 9 ratings, while String averages 3.5 from 62 ratings.

### Do Secnum or String have ads?

Neither Secnum nor String shows ads.

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

Secnum ships an update every 4 months, and String every 2 months. Most recently, Secnum was updated on September 22, 2026 and String on July 25, 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.*