# Nu Omicron Lambda vs OkayMessenger

The clearest difference is in-app purchases: Nu Omicron Lambda at none against OkayMessenger's 11. OkayMessenger's advantage is update cadence (every 5 weeks vs every 39 months) and iOS requirement (13.0 vs 16.1). On price, ads and device support there is nothing between them.

Both are free to download. OkayMessenger sells 11 one-off in-app purchases. Nu Omicron Lambda asks for nothing beyond the download.

Nu Omicron Lambda ships an update every 39 months, OkayMessenger every 5 weeks. The most recent releases landed on September 20, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Nu Omicron Lambda | OkayMessenger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (185 ratings)](https://appshunter.io/ios/app/okaymessenger/id6502973074/reviews)** |
| Number of ratings | — | **185** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 5 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 26 MB | 199 MB |
| Requires iOS | 16.1 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Ricardo Cumberbatch](https://appshunter.io/developer/1455104172) | [AdsPro Digital s.r.o.](https://appshunter.io/developer/1616485192) |

## What reviewers say

### Nu Omicron Lambda

[App page](https://appshunter.io/ios/app/nu-omicron-lambda/id1592825359)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### OkayMessenger

[App page](https://appshunter.io/ios/app/okaymessenger/id6502973074)

A modern messaging application focused on secure and private communication. It offers an intuitive interface for sharing messages and photos, along with customizable personal profiles. Designed for meaningful conversations in a comfortable digital environment.

**Highlights:** Advanced encryption for message security, Private and convenient chat features, Customizable personal profiles, Intuitive and user-friendly interface, Seamless interaction in a safe environment

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 550 Crystalls | $0.99 | one-time |
| 740 Crystalls | $1.29 | one-time |
| 1070 Crystalls | $1.79 | one-time |
| 740 Crystalls | $2.59 | one-time |
| 1820 Crystalls | $2.99 | one-time |
| 2260 Crystalls | $3.59 | one-time |
| 2260 Crystalls | $7.19 | one-time |
| 5340 Crystalls | $7.99 | one-time |
| 6290 Crystalls | $8.99 | one-time |
| 6290 Crystalls | $17.99 | one-time |
| 15180 Crystalls | $20.99 | one-time |


## Frequently asked questions

### Is Nu Omicron Lambda free?

Nu Omicron Lambda is free to download, with no in-app purchases.

### Is OkayMessenger free?

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

### Do Nu Omicron Lambda or OkayMessenger have ads?

Neither Nu Omicron Lambda nor OkayMessenger shows ads.

### Which is updated more often, Nu Omicron Lambda or OkayMessenger?

Nu Omicron Lambda ships an update every 39 months, and OkayMessenger every 5 weeks. Most recently, Nu Omicron Lambda was updated on September 20, 2026 and OkayMessenger on September 27, 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.*