# U Call Pay vs Second Phone Number

The clearest difference is in-app purchases: U Call Pay at none against Second Phone Number's 10. Second Phone Number's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (13.4 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Second Phone Number sells 10 one-off in-app purchases. U Call Pay asks for nothing beyond the download.

U Call Pay ships an update every 3 weeks, Second Phone Number weekly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | U Call Pay | Second Phone Number |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1K ratings)](https://appshunter.io/ios/app/u-call-pay/id1492178675/reviews)** | — |
| Number of ratings | **1K** | — |
| Positive reviews | 97.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 60 MB | 28 MB |
| Requires iOS | 15.6 | **13.4** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [3 Billionaires Corp](https://appshunter.io/developer/1476105863) | [2ND SIM Limited](https://appshunter.io/developer/1787170685) |

## What reviewers say

### U Call Pay

[App page](https://appshunter.io/ios/app/u-call-pay/id1492178675)

Manage your phone number privately and make/receive calls without revealing your primary number. This app also offers a secure and user-friendly way to top up your prepaid mobile service.

**Highlights:** Private phone number management, Make and receive calls privately, Secure prepaid mobile top-up, User-friendly interface, Seamless navigation

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

**In-app purchases:** none


### Second Phone Number

[App page](https://appshunter.io/ios/app/second-phone-number-2nd-sim/id6739813088)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| €1.69 | $1.99 | one-time |
| €1.99 | $1.99 | one-time |
| $1.49 | $1.99 | one-time |
| €2.49 | $2.99 | one-time |
| €4.49 | $4.99 | one-time |
| $4.99 | $4.99 | one-time |
| Virtual Number | $4.99 | one-time |
| $5.00 | $5.00 | one-time |
| €7.49 | $7.99 | one-time |
| €10.49 | $9.99 | one-time |


## Frequently asked questions

### Is U Call Pay free?

U Call Pay is free to download, with no in-app purchases.

### Is Second Phone Number free?

Second Phone Number is free to download, with in-app purchases available.

### Do U Call Pay or Second Phone Number have ads?

Neither U Call Pay nor Second Phone Number shows ads.

### Which is updated more often, U Call Pay or Second Phone Number?

U Call Pay ships an update every 3 weeks, and Second Phone Number weekly. Most recently, U Call Pay was updated on November 7, 2026 and Second Phone Number on October 30, 2026.

---

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