Sec MQTT Pub vs Double memo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sec MQTT Pub
This app provides a secure MQTT client for communicating with IoT devices using X.509 authentication and AES-128 encryption. It allows for customized messages and topics, offering a robust solution for secure IoT project communication.
- X.509 authentication
- Root CA authentication support
- AES-128 encryption
- Face ID / Touch ID support
- Customizable buttons for messages and topics
- Open-source project
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TLS IoT is an open-source end-to-end secured MQTTs client to communicate with your IoT device securely. The client supports the following features: • Use only X.509 to authenticate and secure the communication • Support Root CA authentication • AES-128 encryption to prevent the middle-man attack • Support Face ID / Touch ID You can define up to 4 buttons with customized messages and topics. TLS IoT tool is a secured and easy-to-use app. If you are looking for a highly secured MQTT tool for your IoT project, this app is for you. For more information about this project, including the source code and demos, please visit our project site: https://github.com/tracmo/open-tls-iot-client
Double memo
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Memo that displays and edits two memos side by side
Screenshots
Verdict
The clearest difference is ads: Sec MQTT Pub at none against Double memo's shown. Double memo's advantage is update cadence (every 2 weeks vs every 28 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sec MQTT Pub ships an update every 28 months, Double memo every 2 weeks. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.
| Parameter | Sec MQTT Pub | Double memo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 28 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 15.8.3 |
| Further details — not scored | ||
| Size | 3 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Care Active Corp. | Hideaki Uchikoshi |
In-app purchases
Sec MQTT Pub
No in-app purchases
Double memo
No in-app purchases
