Your inbox, your rules — literally. Lessms is a full SMS and MMS app for Android with a filter engine you own outright: keywords, regex, sender prefixes, your contacts, IP ranges. Free, no ads, nothing to unlock.
Most filters make the call for you and hand you an on/off switch. Lessms hands you the engine.
^ to match how it begins — ^+1900 takes a whole range, @vtext.com takes a gateway.^ to treat it as a prefix.. covers all of them, Smith covers a family. Someone who isn't in your contacts never matches it, so an allow rule written this way protects everyone you know and nobody you don't.Matches go to Junk instead of your inbox.
Matches always reach you, whatever else would have caught them.
Matches are labelled and left alone — sort without filtering.
Any rule can be inverted — ticking one box makes it match when its pattern does not, which is how "everyone in my contacts except this one number" is written as a single rule. An inverted rule still needs something to read: a message with no text, or a sender who isn't a contact, is never caught by one.
Every one of these is yours to manage. You write the rules, you tune them, you switch them off. Nothing is decided somewhere else on your behalf, and there is no list you can't read. The Rule Tester lets you try a pattern against a message right here in the browser before it ever touches your phone.
Lessms replaces your default messaging app, giving you a clean inbox while handling all your SMS and MMS normally.
Six rule types across three lists — junk it, allow it, or just label it. Allow your contacts in one rule so nothing you care about is ever at risk, and invert any rule to mean its opposite.
Import rules other people have already written and tested, straight from the forum or a QR code. You see the rule before it is added — never a blind install.
Make your own categories and let rules fill them. Your existing conversations get tagged too, not just new ones.
Design your own look with the visual theme builder, or browse and import community-designed themes. Every color slot is customizable.
Define text expansion macros for commonly typed replies. Tab-delimited import makes it easy to bring in large macro sets.
Run an on-demand scan of your existing inbox to catch spam that slipped through before you installed Lessms.
Filtering runs entirely on your phone. It keeps working with no signal — on a plane, underground, or abroad — and there is nothing to activate on a new phone.
If you came from Samsung Messages you had Conversation categories — folders you made yourself and filled by hand. Google Messages gives you four it chose for you, and no way to add a fifth. Lessms has tags, which do that job and then keep doing it.
Tag names take letters, numbers and underscores, up to 30 characters — Deliveries, Work_Stuff, Kids_School. Tagging never filters anything on its own: a tagged message still arrives in your inbox exactly as it would have. It is filing, not filtering.
Spam evolves constantly. A single person can't keep up — but a community can. Lessms brings together users to share examples, build rules, and test patterns in real time.
All of it. Filtering included, no account required, nothing to buy inside the app.
Free because the app isn't the business: filtering runs on your phone, your rules stay yours, and there is nothing here to sell. In time there will be an optional paid service for people who would rather not maintain a ruleset by hand — a curated one, kept current for them. Everything on this page stays free when it arrives.