# Số Lạ vs IPMS

The clearest difference is update cadence: Số Lạ at every 6 weeks against IPMS's every 5 months. IPMS's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Số Lạ ships an update every 6 weeks, IPMS every 5 months. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Số Lạ | IPMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (18 ratings)](https://appshunter.io/ios/app/so-la/id6462660717/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | Free | — |
| Size | 36 MB | 38 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tuan Anh Vu](https://appshunter.io/developer/398453365) | [Ngo Thach](https://appshunter.io/developer/1482229390) |

## What reviewers say

### Số Lạ

[App page](https://appshunter.io/ios/app/so-la/id6462660717)

This app identifies spam calls and displays caller ID, featuring a large blacklist of unwanted callers. It also provides a comprehensive directory of Vietnamese businesses and individuals, and allows reporting of fraudulent bank accounts. Enhanced features are available for newer iOS versions.

**Highlights:** Spam call identification, Caller ID display, Extensive blacklist, Vietnamese business directory, Fraudulent bank account reporting, Live Caller ID Lookup (iOS 18+)

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

**In-app purchases:** none


### IPMS

[App page](https://appshunter.io/ios/app/ipms/id6468434643)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Số Lạ free?

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

### Is IPMS free?

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

### Do Số Lạ or IPMS have ads?

Neither Số Lạ nor IPMS shows ads.

### Which is updated more often, Số Lạ or IPMS?

Số Lạ ships an update every 6 weeks, and IPMS every 5 months. Most recently, Số Lạ was updated on October 8, 2026 and IPMS on September 30, 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.*