# UP vs Rattlegram

The clearest difference is update cadence: UP at monthly against Rattlegram's every 9 months. UP also leads on rating (4.7 vs 4.5) and review sentiment (100% vs 90%). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

UP holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 29 and 23 respectively. Written reviews point the same way: 100% of UP's written reviews are positive against 90% of Rattlegram's.

UP ships an update monthly, Rattlegram every 9 months. The most recent releases landed on September 11, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | UP | Rattlegram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (29 ratings)](https://appshunter.io/ios/app/up-messenger/id1644037554/reviews)** | [4.5 (23 ratings)](https://appshunter.io/ios/app/rattlegram/id1664526096/reviews) |
| Number of ratings | **29** | 23 |
| Positive reviews | **100.0% of reviews** | 90.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 9 months |
| Monetization | Free | Free |
| Size | 136 MB | 1 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Unplugged Technologies Ltd](https://appshunter.io/developer/1644037556) | [aicodix GmbH](https://appshunter.io/developer/1664526098) |

## What reviewers say

### UP

[App page](https://appshunter.io/ios/app/up-messenger/id1644037554)

This communication tool prioritizes user privacy by offering end-to-end encrypted messaging and calls. It allows for secure sharing of various media types and the creation of private or public chat rooms. The app is designed to prevent data mining and monetization, fully complying with GDPR.

**Highlights:** End-to-end encrypted messaging, Encrypted audio/video calls, Screen sharing, Private and public chat rooms, File sharing, Privacy-first design, GDPR compliant

**Features:** macOS Compatibility

**In-app purchases:** none


### Rattlegram

[App page](https://appshunter.io/ios/app/rattlegram/id1664526096)

This app utilizes advanced COFDM technology for audio-based SMS transmission. It supports various modes with specific encoding and modulation techniques, requiring minimal bandwidth for efficient data transfer.

**Highlights:** COFDM technology, Audio-based SMS, 160 ms OFDM symbols, Differential PSK modulation, Forward error correction, Low bandwidth requirement

**In-app purchases:** none


## Frequently asked questions

### Is UP free?

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

### Is Rattlegram free?

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

### Which has better reviews, UP or Rattlegram?

UP is rated higher. UP averages 4.7 out of 5 from 29 ratings, while Rattlegram averages 4.5 from 23 ratings.

### Do UP or Rattlegram have ads?

Neither UP nor Rattlegram shows ads.

### Which is updated more often, UP or Rattlegram?

UP ships an update monthly, and Rattlegram every 9 months. Most recently, UP was updated on September 11, 2026 and Rattlegram on September 8, 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.*