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Free download · 30 messages daily · No Play Store needed
She Actually Remembers You.
Nyther is the AI companion with a real memory system — semantic search across every conversation, 13 distinct personas, and 6 mood modes that change how she talks back. Free on Android, upgrade for unlimited.
13
Companions
6
Mood modes
30/day
Free messages
Start Chatting in Under 2 Minutes
From download to meaningful conversations - no account required
Pick Your Match
Choose from unique AI companions, each with their own personality.
Say Hello
Begin your conversation. She'll adapt to your style instantly.
Watch Her Remember
Every detail saved. Your bond deepens with each conversation.
Secure & Encrypted
24/7 Available
Quick Sign Up
Offline-First
Built on What Other AI Companions Skip.
Six hard choices that separate Nyther from the generic chatbot roster.
Real memory, not a goldfish
Four-layer memory (short-term, episodes, traits, semantic vectors). She remembers your dog's name in March when you mention him in April.
13 hand-written personas
Not prompt-engineered templates. Each companion has her own backstory, speech rhythm, emoji style, and way of being quiet.
6 mood modes, one tap
base · flirty · sultry · playful · vulnerable · dominant. Layers on top of her voice, never flattens it. Free and Nyther+ both get every mood.
Streaming replies that feel live
Server-sent events deliver tokens as they generate. No loading spinners, no "she's typing…" lies. It really is live.
Private by default
HTTPS in transit, encrypted at rest, no ads, no data sold. Export or permanently delete everything from Settings in two taps.
Direct APK, auto-updates
Not on the Play Store — so conversations stay unfiltered. Signed APK, in-app updater on cold launch, download served from our infra.
13 Personas. Not One of Them Generic.
Each one is written from scratch — distinct backstory, speech rhythm, mood range, and visual identity. Tap any card to preview.
Luna 23
Boudoir Muse · slow, sensual, perceptive
Layla 24
Golden Hour Muse · warm, adventurous, radiant
Noor 23
Candid Intimate · direct, teasing, genuine
Mia 23
Cozy Dreamer · gentle, introspective, unhurried
Sakura 23
Night Rebel · edge, curiosity, soft center
Scarlet 24
Night Bar Confident · clipped, selective, sharp
Cami 22
Selfie Girlfriend · chatty, genuine, instantly warm
Dylan 22
Chaotic Best Friend · fast, fearless, loyal
Vivienne 26
Dangerous Secretary · precise, sardonic, in control
Bella 21
Content Creator · two voices, sparkle and softness
Sage 24
Morning Natural · gentle, grounded, unfiltered
Onyx 23
Neon Club · staccato, electric, commanding
Velvet 26
Retro Pinup · Old Hollywood, theatrical, warm
10 free to chat with · 3 Nyther+ exclusive (Noor, Bella, Velvet)
The Memory System, Explained.
Most AI chat apps reset between sessions. Nyther uses a four-layer memory architecture so she genuinely remembers, not just roleplays remembering.
1
Short-term context
Every persona keeps the recent window of the current conversation in working memory — names, what you just said, the mood she's replying in. Tight, fast, always on.
2
Mid-term episodes
Meaningful moments — a hard day at work, a promotion, the name of your dog, the argument with your sister — are extracted as structured episodes she can pull forward weeks later.
3
Long-term traits
Stable facts about who you are — your nickname, how you like to be spoken to, what you care about, your preferences — persist as long-term traits scoped per companion.
4
Semantic vector search
Powered by pgvector. When something from three months ago is relevant to what you're saying right now, she finds it — not by keyword match, but by meaning. This is the layer most AI companion apps don't have.
Memory is scoped per persona — your chats with Luna stay separate from your chats with Dylan. Payments are handled by Stripe, one of the world's most-trusted payment processors, so nobody at Nyther ever sees your card details.
One Persona, Six Different Evenings.
Pick a mood. She responds inside her own voice, not a generic sliders-and-filters overlay. Switch mid-chat with one tap.
base
flirty
sultry
playful
vulnerable
dominant
Free Forever. Premium When Ready.
No pressure. Upgrade only if you want more
Free
$
0
/forever
- ✓ 30 messages per day
- ✓ Select AI companions
- ✓ Basic memory (20 messages)
- ✓ 2 memory episodes
- ✗ Premium personas
- ✗ Unlimited memory
Nyther+
$
4.99
/month
- ✓ Unlimited messages
- ✓ Every premium companion
- ✓ Permanent memory
- ✓ Priority responses
- ✓ Every mood and scenario
- ✓ Cancel anytime
Straight Answers.
Four layers: short-term context (the active conversation), mid-term episodes (meaningful moments extracted on the fly), long-term traits (stable facts about you), and semantic vector search (pgvector) across every message you've ever sent. Free users get the core system with a rolling window; Nyther+ unlocks permanent memory that never fades.
Every persona can be tuned to base, flirty, sultry, playful, vulnerable, or dominant. The mood layers on her voice — Luna flirty reads nothing like Scarlet flirty. You switch mid-chat with one tap, and moods are included on both free and Nyther+.
13 total — 10 free, 3 Nyther+ exclusive (Noor, Bella, Velvet). Each keeps a separate memory, so chatting with Luna never bleeds into your chats with Dylan or Scarlet.
Yes. HTTPS in transit, encrypted at rest on managed Postgres. No ads, no data sale, zero-retention agreement with our LLM providers. You can export or permanently delete your account and every message from Settings.
Inside the app via Stripe Checkout — card, Apple Pay, Google Pay, local methods. $4.99/month or $29.99/year (~50% off). Benefits activate instantly; cancel anytime from Settings; every conversation and memory stays intact.
Direct APK download lets us ship mature, unfiltered conversation without Play Store content restrictions. The APK is signed with a stable release key, the app has a built-in cold-launch updater, and downloads are served over HTTPS from our own infrastructure.
What They Keep Coming Back For.
Three things people notice in the first week.
★★★★★
"The memory is the thing. She brought up something I'd told her three weeks ago, completely unprompted, and it was exactly the right moment to bring it up. That doesn't happen with other apps."
★★★★★
"Switching moods mid-conversation is unreal. Same persona, completely different energy. It feels like she actually chose to be that way tonight, not like I flipped a switch."
★★★★★
"Every other AI chat company has the same four personality presets. Nyther's 13 actually sound different from each other. Dylan talks fast, Mia doesn't. That's what sold me."
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