# Private Message Box vs Kosmos Hi Lo

The clearest difference is review sentiment: Kosmos Hi Lo at 100% against Private Message Box's 7%. Kosmos Hi Lo also leads on ads (none vs shown). Private Message Box's advantage is iOS requirement (13.0 vs 16.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Private Message Box sells 5 in-app purchases, starting at $4.99 per year and Kosmos Hi Lo sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Private Message Box ships an update monthly, Kosmos Hi Lo every 2 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Private Message Box | Kosmos Hi Lo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (23 ratings)](https://appshunter.io/ios/app/private-message-box/id907028613/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 6.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 50 MB | 93 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Vartit Technology Private Limited](https://appshunter.io/developer/907028616) | [Switch168 Communications Corporation](https://appshunter.io/developer/926586344) |

## What reviewers say

### Private Message Box

[App page](https://appshunter.io/ios/app/private-message-box/id907028613)

Secure your private conversations with password protection. Send unlimited texts, photos, and location details to other users for free. Enhance your privacy with a virtual number option.

**Highlights:** Password protected conversations, Free texting between users, Send unlimited text, photo, and location, Full emoji support, Virtual number for hidden communication, Privacy Guard

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Proversion | $4.99 | per year |
| Buy Number - Zone1 Yearly | $21.99 | per year |
| Buy Number - Zone2 Yearly | $58.99 | per year |
| Buy Number - Zone3 Yearly | $102.99 | per year |
| Get SMS Balance | $6.99 | one-time |


### Kosmos Hi Lo

[App page](https://appshunter.io/ios/app/kosmos-hi-lo/id1011603314)

This app offers two distinct communication platforms for private messaging and calling. One is for sensitive conversations with friends, featuring a 'kill code' to delete messages. The other is for everyday interactions.

**Highlights:** Dual communication platforms, Private messaging, Voice and video calling, Secure 'Hi' level communication, Daily 'Lo' level interaction, Message deletion 'kill code'

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Koins | $0.99 | one-time |
| 200 Koins | $1.99 | one-time |
| 500 Koins | $4.99 | one-time |


## Frequently asked questions

### Is Private Message Box free?

Private Message Box is free to download, with in-app purchases available.

### Is Kosmos Hi Lo free?

Kosmos Hi Lo is free to download, with in-app purchases available.

### Do Private Message Box or Kosmos Hi Lo have ads?

Private Message Box shows ads; Kosmos Hi Lo does not.

### Which is updated more often, Private Message Box or Kosmos Hi Lo?

Private Message Box ships an update monthly, and Kosmos Hi Lo every 2 months. Most recently, Private Message Box was updated on October 24, 2026 and Kosmos Hi Lo on October 22, 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.*