This week in #FDroid (TWIF) is live:

* #calculators can't calculate
* #DeltaChat #ArcaneChat care about #metadata
* #Fennec Firefox has a notification
* #FMD and much #UnifiedPush news
* #FreeOTPplus long awaited update
* #Saracroche 1 year old
* #Schildichat back on track
* #Weblibre Firefox tricks
+ 17 new apps
& 190 updates
- two archived

Two plus two equals whatever: https://f-droid.org/2026/03/27/twif.html

In #DeltaChat when you go into Settings -> Connectivity, what is "Incoming Messages" and why does mine say 21 MB of 100 MB used? Is that per month, per week, per day?

End-to-End Encryption is good but metadata protection counts as much. Names, group descriptions and memberships, avatars, who talks to whom ...

Both #deltachat and #signal go to great length to protect all the metadata that WhatsApp grants itself gratuitously. #Matrix stores similar scales of metadata on their servers, even if you can choose which server stores it.

Everything is better than #Telegram which additionally stores message contents in all group chats/channels and most 1:1 chats.

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screenshot of artifical WhatsApp screen courtesy of @fex@cfn.social [Lock Icon] Your personal messages are end-to-end encrypted¹ But: When you message someone is saved forever. When you type is saved forever. Your approximate location is saved forever. Every profile picture is saved forever. Every status update is saved forever. Every group name is saved forever. Every group description is saved forever. Every community name is saved forever. Every community description is saved forever. Every time you join a group is saved forever. Every time you leave a group is saved forever. Every new contact is saved forever. Deleting a contact is saved forever. What you search for is saved forever. Who you call and when is saved forever. When you hang up is saved forever. When you’re online is saved forever. When you’re offline is saved forever. Every link you open is stored forever. Your phone model is stored forever. Your operating system is stored forever. Your battery level is stored forever. Your signal strength is stored forever. Your app version is stored forever. Your mobile network is stored forever. Your Wi-Fi network is stored forever. ..... Your IP addresses are stored forever. Your meta ID is stored forever. Your settings are stored forever. ¹Just in case your contacts don’t back up your messages with Google or Apple

Alguien (creo que en el blog) me dijo que Delta Chat no es la mejor opción para grupos públicos. Efectivamente, no lo es. Delta Chat es una aplicación pensada para usarse con amigos y gente cercana, por lo que todos los miembros de los grupos tienen los mismos poderes, los de administrador. Y recomiendan grupos de "solo" 150 personas.
Como todo, está perfectamente documentado en su web:
https://delta.chat/es/help#groups

#DeltaChat

Para lo del Delta chat, lo estoy probando, así que si me lo piden por aquí (de a uno) yo les paso link.

#deltachat

@editora
Prueba arcane chat, es otra app FA el protocolo delta.chat

#arcanechat #deltachat

Después de leer este post de @aperalesf

https://adrianperales.com/2026/03/delta-chat-puede-ser-la-respuesta/

y de que @rober, @fmolinero y @revu insistieran me he creado una cuenta de Delta Chat.

La he creado desde el ordenador de mesa, que no sabía que se podía hacer —gracias, Revu, por el tip—.

Tengo que decir que si desde un móvil es igual de fácil crear la cuenta, es ideal para personas que no tienen ni idea de tecnología.

La pena: Mi móvil y mi portátil son antiguos y Delta Chat no funciona en ellos.

#deltachat

The last two weeks saw a dev gathering in the black forest from several in #chatmail, #deltachat and #webxdc communiities, also joined by @n0iroh and @rpgp folks. The tech demos and hacking results we presented to each other, were pretty mind blowing and tracing a path to very interesting futures, delivered in working code, not just some grand plan. Let us just say for now that we are getting to the fun parts of an age old http://testrun.org motto :) happy #equinox! May the tides turn!

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Top part of the https://testrun.org web page with the motto "experimenting with the future of email". Below is a dinosaur head with an open mouth about to swallow a zeppelin

También en mi cápsula Gemini:
Delta Chat puede ser la respuesta
gemini://capsula.adrianperales.com/gemlog/2026-03-19-deltachat-puede-ser-la-respuesta.gmi

#EnMiGemlog #Gemlog #GeminiHispano #GeminiProtocol #DeltaChat #SoftareLibre #RedesLibres

Thursday is a good day to delta with friends and family.

Switch a loved one to #DeltaChat – the decentralised secure open source messenger from Europe.

#DigitalSovereignty #diday #goeuropean

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Thursday is a good day to delta with friends and family. Switch to #DeltaChat – the decentralised secure open source messenger from Europe.

Fun funding fact: If we had 10 times more money to develop #deltachat , the #chatmail relay network and the #webxdc secure mini app ecosystem, we would still have ten times less than what signal has (let alone Whatsapp or telegram). But we don't want to increase nudging people for donations, as we have many users who don't even have a legal way to send us money, let alone the means. It is a special kind of reward that delta works where most if not all other messengers fail to work for users.

I know #Signal is very popular, but at least for me, using NVDA, the desktop client is far less screen reader friendly than the mobile clients. The mobile clients work far better for me, but I honestly don't use my phone for much these days outside of being a media player that can make phone calls, so, as of right now, I'd recommend Delta Chat instead https://delta.chat/en/ #DeltaChat

OH in some chaos circles "#deltachat is the new emacs of operating systems" ...
We are not sure about that 😂 but what we do know is we are soon bringing out releases that we have been working towards for 12 months in multiple already released steps. The funniest thing? Nothing changes on the surface which was precisely what we worked for so long ... more soon, after internal testing and some pending bug fixes land :) and no worries, there will also be interesting visible changes. Stay tuned :)

#didYouKnow that you can attach multiple images in #deltachat at the same time?

just tap the attach button, then "Gallery" ("Images" on desktop) and select all images from the last family barbecue 💡

depending on the system, you may need to long-tap the first image 💡

We hereby challenge _all_ other messaging apps, FOSS or not, to provide a more convenient private onboarding experience than #deltachat

1. Install app
2. "Create new profile"
3. Enter nick name, tap "Agree and continue"
4. Tap "+" and "new contact" and provide/scan qr code/link

Voila! A secure private chat, familiar to those coming from Whatsapp or Telegram (without "AI", with #a11y).

Note: chat identities are private and can not be queried or discovered. Servers keep no track or metadata

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Start screen of https;//get.delta.chat apps which shows Delta chat logo (Greek letter delta) Secure decentralized chat "Create new profile" button highlighted

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Create profile screen With a field to enter a name ... "Fediverse chicken" was typed A link to the privacy policy of nine.testrun.org, the default onboarding chatmail relay A highlighted button "agree and continue" A button "use other server"

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Screenshot of newly created profile Title bar "fediverse chicken" Two chats in the chat list: "Device messages" with instructions how to setup contact with another chat profile "Saved messages" where you can "save" messages from other chats to memorize them

We'd like to remind everyone that a self-hosted #chatmail relay is best shared in some wider than family circles. In crisis situations everbody does better when helping others.

A typical 1gb RAM chatmail relay VPS for 5-10 eur per month supports 50k+ daily users.

chatmail VPSes are stateless. You can wipe all disk state, reinstall and chatting will resume. Conversely, #deltachat does not keep or depend on any server state .Operators under pressure do not need to feel bad to hand over data.

La idea de pasarse a XMPP ya como que me remata, porque todo el trabajo de pasar a tu entorno recae en el que lidera la propuesta y para eso hay que tener entusiasmo y fuerza.

Tuve una época en la que estuve usando #deltachat con el correo electrónico y si hay que hacer esfuerzos en promocionar sistemas (en mi opinión) es en el correo electrónico. Mecanismo que empezamos a perder porque todo el mundo tiene uno, todo el mundo lo necesita, pero nadie quiere pelear por el suyo. Igual que con el fediverso.

1 cent per five years .... is the current marginal hosting cost for a #chatmail address, with which #deltachat apps facilitate world-wide private messaging including interactive #webxdc apps that run end-to-end encrypted in any chat group.

<1 Million EUR per year is the estimated marginal hosting costs for 350 Million EU citizens. Such scaling requires, however, research and development, including careful UX and #cryptography work. Related writing from @gordon

https://newsletter.squishy.computer/p/cryptography-scales-trust

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screenshot of key excerpt from the referenced post: "When the network is built on cryptographic protocols, we don’t have to trust anything in-between. We don’t have to trust the computers, the wires, the institutions, beliefs, or kinship of the network participants. We can trust the math. All we have to do is verify the message with cryptography. This is a powerful primitive for scaling trust, because it means everyone on the network can cooperate together, even if they don’t trust each-other. The costs to producing high-trust results are greatly reduced, and we can spend our coordination efforts on building larger, more fine-grained, more complex networks of cooperation."

Public service announcement:

1. If you want to link your #Fediverse profile to a chat account please consider just saying "DM me for #deltachat invite link" and NOT PUBLISH it to "all".

2. If you do publish invite links to groups and so on, please consider doing it with a dedicated delta chat profile that is not your private profile. Multi-Profile for the win.

3. We want to evolve the #securejoin invite link UX to better prevent unsafe practises. Involves tons of considerations. 💜

With our #deltachat #chatmail and #webxdc efforts we put all intelligence on the end devices, and architecutally separate it from a transport layer that routes safely and fast but knows nothing.

There are a dozen or more #chatmail servers across many jurisdictions, all safely interopable with each other and classic servers.

Turned out we can dumb down email servers by relying on cryptography instead of IP reputation and ai/spam filtering. And have 200ms delivery times. We are not done :)

Did you know that #deltachat does not need and does not use key servers? Most other messengers (wa/signal/matrix/threema/...) actually operate or incorporate a cryptographic key server, managing the cryptographic identities of all users. Delta Chat uses decentralized protocols for key management avoiding a central storage of identities. The SecureJoin protocol is the key (sic!) innovation and was independently analyzed by ETH Zürich researchers earlier this year .... https://delta.chat/en/2024-03-25-crypto-analysis-securejoin

How many people do you know that have lost their messaging history on Whatsapp or Signal, photos etc during mobile phone transitions or breakage or through other shenenigans?

With #deltachat you can:

- export "everything" to a file and import it on any of the many different devices

- or just setup a second device through a QR code scan -- which was happily discovered here after an accidental factory reset https://libranet.de/display/0b6b25a8-2066-0695-ca24-081964494389