Comparison

ThermoFlux vs IRONDOTS CHAT

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

ThermoFlux

Features
Read full description

Aplikacija omogućava olakőava rad serviserima prilikom puőtanja uređaja u rad ili prilikom rada na servisu uređaja.

About

IRONDOTS CHAT

This app enables secure, encrypted text messaging solely through sound waves, without requiring an internet connection. It prioritizes user privacy with anonymous operation and robust end-to-end encryption, ensuring messages are unreadable by unauthorized parties.

Highlights
  • Encrypted text messaging via sound
  • Offline operation, no internet needed
  • Anonymous usage, no registration required
  • End-to-end encryption
  • Physical separation for security
  • Compliant with European Data Protection Act
Features
Read full description

IRONDOTS CHAT allows you to send and receive encrypted text messages through sound waves. The app does not connect to the internet and all encrypted messages are only transmitted by sound or ultrasound. To receive incoming messages, you only need to allow access to your device's microphone. THE IRONDOTSCHAT PRINCIPLE IRONDOTSCHAT protects your messages from access by hackers, companies and governments through physical separation and end-to-end encryption. The app can be used completely anonymously (without registration; without providing a phone number or email address). IRONDOTS is based on the "box" model of the open source NaCl Networking and Cryptography Library to transmit messages with a maximum length of 40 characters encrypted through sound waves. COMMUNICATE WITHOUT TRACES IRONDOTSCHAT is designed for offline operation, without an internet connection. We have simply not implemented the possibility to communicate with the Internet or other devices. Your secret certificate is stored encrypted with your password on the mobile phone/tablet. All this prevents the collection and misuse of personal information. IRONDOTS is fully compliant with the European Data Protection Act (DPA). BEST ENCRYPTION All messages are always end-to-end encrypted. You can be sure that no one except the intended recipient can read your messages. The key pair is generated and stored encrypted directly on your device. 256-bit long asymmetric keys are used, which are generated using elliptic curve cryptography (Curve25519). This asymmetric key is used to obtain a unique 256-bit symmetric key for each message sent. NO ADS, NO TRACKERS, NO COOKIES IRONDOTSCHAT is not financed by advertising and does not collect user data. SUPPORT / CONTACT Support: security@irondots.com

Screenshots

ThermoFlux3 screens
IRONDOTS CHAT4 screens

Verdict

The call

The clearest difference is in-app purchases: ThermoFlux at none against IRONDOTS CHAT's 1. IRONDOTS CHAT's advantage is update cadence (every 6 months vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. IRONDOTS CHAT sells 1 one-off in-app purchase. ThermoFlux asks for nothing beyond the download.

UpkeepUpdate frequency

ThermoFlux ships an update every 13 months, IRONDOTS CHAT every 6 months. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

Scorecard2 real differences Β· 6 level
ThermoFlux versus IRONDOTS CHAT: the parameters behind the verdict, then further details
ParameterThermoFluxIRONDOTS CHAT
PriceFreeFree
Positive reviewsβ€”60.0% of reviews
Update frequencyEvery 13 monthsEvery 6 months β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
Monetizationβ€”Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.114.0 β€” better
Further details β€” not scored
Size23 MB36 MB
Age rating4+4+
DeveloperQSS d.o.o.MICHAL NAPIORKOWSKI IT

In-app purchases

None

ThermoFlux

No in-app purchases

1 purchases

IRONDOTS CHAT

One-time1
  • Export/Import Private Key$29.99

Questions

Is ThermoFlux free?
ThermoFlux is free to download, with no in-app purchases.
Is IRONDOTS CHAT free?
IRONDOTS CHAT is free to download, with in-app purchases available.
Do ThermoFlux or IRONDOTS CHAT have ads?
Neither ThermoFlux nor IRONDOTS CHAT shows ads.
Which is updated more often, ThermoFlux or IRONDOTS CHAT?
ThermoFlux ships an update every 13 months, and IRONDOTS CHAT every 6 months. Most recently, ThermoFlux was updated on November 7, 2026 and IRONDOTS CHAT on November 4, 2026.

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