Portrait mode recommended Rotate your phone upright to continue Echo Core.
VIRTUAL CREATURE SYSTEM

Raise the signal.
Shape the Echo.

Daily care forms its identity. Training awakens its power. This first prototype keeps your companion alive between visits without punishing long absences.

Prototype 01 Care loop · Offline progress · Local save
ECHO CORE
EC–01
PERSONAL ECHO TERMINAL

ECHO CORE

A new signal is waiting to be linked.

BUILD 2.1.0 · LOCAL PROFILE
FIRST RESONANCE

Choose your Echo egg

Choose a lineage that grows from Spark Form through Hatchling, Core, Ascended, Surge, and Apex forms.

EGG 1 OF 5
Select an egg to inspect its lineage.
A new signal is listening…
Your Echo companion
UNBOUND CHOOSE AN EGG
✦
CURRENT STATECURIOUS
Your signal feels steady.
DAILY ROUTINE

Care

All signals stable
DAILY SIGNALToday’s resonance
0 / 3

Complete all signals · Mood +6 · Bond +3 · 8 Shards

i

Care influences the permanent form your Echo develops into.

RESONANCE LAB

Training

LV 1
EXPERIENCE0 / 130 XP
SPARRING UNLOCKS AT HATCHLING FORM · DAY 1
COMPANION RECORD

Data

HATCHED FROM No Core Egg selected
COMPANION NAMEUnbound
TIME TOGETHER Not hatched yet
KEEPER IDEC-••••-••••
COMBAT CALIBRATIONBattle Profile
NEXT EVOLUTION PROGRESSSignal encrypted

These readings shape the path. One condition remains hidden.

Bond requirement0%
Training requirement0/0
Care qualityUnknown
Unknown requirement???

Choose a Core Egg to begin decoding a signal.

BATTLE MEMORYLineage Skills＋
KEEPER JOURNEYMilestones＋
0 / 8BADGES AWAKENED
ENCOUNTER RECORDSignal Archive＋
0 / 22SIGNALS IDENTIFIED
LINEAGE MAPEvolution Tree＋
FIELD STORAGEBag＋
ITEMS0SHARDS0CRESTS0

Explore Adventure Signal nodes to discover loot.

LATEST MEMORY

No recent memories.

PERSONAL MEMORYThings I Remember＋

Your companion is still learning about life with you.

CARE JOURNALActivity History＋
    DETAILED RECORDMore Details＋
    SYSTEM CONTROLSettings＋
    MusicAmbient Echo Core soundtrack
    Sound EffectsCare, training and battle feedback sounds
    Battery SaverReduce particles, idle motion and haptics
    Dark InterfaceUse a darker in-game control panel
    Reduced MotionLimit decorative movement while keeping action feedback
    Live NotificationsCare alerts and personality chats, even when closed
    Game versionInstalled PWA build
    2.1.0
    ↻
    ECHO CORE · VERSION 2.1.0

    What’s new?

    v2.1.0 · Daily Signal Update
    ⇧

    Guide & Install Tips

    Install on iPhone or iPad

    1. Open the Echo Core URL in Safari.
    2. Tap Share (the square with an upward arrow).
    3. Scroll and choose Add to Home Screen, then tap Add.

    iPhone normally does not show an automatic install pop-up, so use Safari's Share menu.

    Install on Android

    1. Open the URL in Chrome.
    2. Tap the ⋮ menu and choose Install app or Add to Home screen.
    3. Confirm the installation.

    Install on desktop

    In Chrome or Edge, use the install icon in the address bar or the browser menu's Install Echo Core command.

    Care tips

    Meals can be served at any Hunger level. Three meals are available per cycle, followed by a 30-minute cooldown. Treats have their own 30-minute cooldown. Meditation restores 30–80 Energy and can be used once every 90 minutes. Waste can build up to nine piles: six is the safe limit, while seven or more causes sickness and continuous Health loss. A Critical Echo remains recoverable—clean the habitat and use medicine. A full rest cycle takes eight verified hours.

    Evolution milestones

    1. Spark Form appears immediately after hatching.
    2. Hatchling Form and its first route unlock on Day 1.
    3. Core Form develops on Day 3.
    4. Ascended Form unlocks at Level 10.
    5. Surge Form unlocks at Level 20.
    6. Apex Form unlocks at Level 30.

    Care, training style, bond and mistakes decide which route is selected. Check Data → Evolution Tree to inspect every possible form. Later levels need increasingly more XP, so Ascended, Surge and Apex growth take longer.

    Weather & training

    The forest changes between day and night, and each season lasts seven pet days. Heat can raise Stress; rest or play helps. Training can succeed or fail depending on mood, energy, LUCK and Stress. Pulse Drill uses a punching bag with random punches, kicks, jump strikes or winged flying impacts. Sparring unlocks from Hatchling Form onward. A failed session may leave your Echo needing a Treat.

    Adventure Signal

    The 24-node Crestveil Grove appears before the 36-node Fractured Garden, while The Glasswind Expanse contains 48 nodes. Boss guardians appear every twelfth node. A node may reveal a minion, real cache, rare golden cache, safe camp, wandering Echo, empty chest, mimic, trap, quiet trail, food or power-up. All regions keep separate map progress while loot is shared in Data → Bag. Quick Scan unlocks after clearing three nodes in a region.

    Crestveil shrines, rare caches and guardian victories may reveal one Crest matched to your egg lineage; Node 24 guarantees it if none appeared earlier. The Crest does not skip or alter normal evolution. When a boss is far above your current level/power, an in-game alert lets you use the Crest for that battle or fight normally. Used Crest power recharges for 12 hours.

    A node without recovered loot can be scanned again after an enemy, boss, trap or quiet outcome. Loot closes the node immediately; otherwise its signal expires after the fourth scan. The next map node unlocks after the first scan, so revisiting never blocks progression.

    Spark Forms cannot enter. Hatchling Forms may enter after accepting a high-risk warning: losing the fourth clash can cause a severe injury and major Health loss, but the Echo remains recoverable. Core Forms and later stages enter normally.

    Friends & Visit

    Battle records

    Every battle uses four automatic clashes and the fourth clash decides the result. Data → Lineage Skills shows abilities unlocked at Levels 1, 10 and 20. Signal Archive identifies enemies only after an encounter, while Milestones record important Keeper achievements.

    Every installation receives a Keeper ID. Open Care → Friends & Visit, then copy or share your ECS1 Friend Signal Code. Your friend reviews it under Pending Requests, then approves or declines it. Once linked, the game publishes only the public pet name, lineage, form and level; online friends refresh automatically after either player opens the updated game.

    Friendly Signal Battle unlocks when both companions reach Hatchling Form. It uses the latest available friend profile, plays four animated clashes and lets the final clash decide the winner without permanent Health loss.

    Visits are reciprocal: a friend visiting you never blocks you from visiting them. Each friend gives one rewarded visit per server day, with a maximum of three rewarded friends per day. Further visits in either direction still play normally without another reward. At the end of a visit, use Save / Share Memory to create a PNG for your phone’s Share Sheet or Downloads folder.

    Protect your save

    Progress belongs to the browser or installed PWA currently in use. Export a JSON backup from Data before clearing browser data, uninstalling, or changing phones.

    Notifications

    Turn Live Notifications on from Settings to receive personality-based hunger, clean-up, energy, check-in and joke alerts. iPhone and iPad permission is available after the PWA is added to the Home Screen. Once the hosted Live Signal service and its five-minute cPanel cron job are active, alerts can arrive even when the PWA is fully closed.
    ⌾

    Privacy & Policy

    Last updated: 21 July 2026

    Local game data

    Echo Core does not require an account. Pet progress, settings and care history are stored locally in this browser or installed PWA.

    No personal information

    The game does not ask for a name, email address, contact list, location, camera or microphone access.

    Offline Friend Signals

    A Friend Signal Code contains a random Keeper ID plus the pet name, family, form, level and sharing time visible inside the game. It does not contain a phone number, email address or push-device identifier. The same public profile is stored by Echo Core so approved friends can refresh your visible form and level; pet saves, care stats, Bag contents and visit history remain only in your browser.

    Live notification data

    If Live Notifications are enabled, the server stores an anonymous random device ID, browser push endpoint, public encryption keys, pet family, display name and upcoming care-alert times. It does not receive the full local save. Turning notifications off removes that subscription; inactive subscriptions are automatically deleted.

    Memory images

    Friend Memory PNGs are generated locally from game artwork. Saving or sharing requires a direct button press and uses the browser’s download feature or the phone’s Share Sheet.

    Save responsibility

    Clearing browser data or uninstalling the PWA may remove local progress. Use Export Save to create a backup before changing device or browser.

    Hosting logs

    The website host may retain ordinary technical access logs such as IP address, browser type and request time according to the host's own policy.

    Updates

    Checking for an update only asks the browser to refresh the app files from this Echo Core website.
    ✎

    Name your companion

    This name can only be changed once for this pet.
    ◆

    Choose a meal

    Pick one item for this feeding.

    Food restores Hunger gradually. You may serve three meals, then the tray rests for 30 minutes.
    ＋

    Choose medication

    Select a treatment to restore health.

    Medication restores Health immediately. Higher tiers have stronger effects.
    ◇
    SOCIAL SIGNAL

    Friends & Visit

    YOUR KEEPER ID EC-••••-••••

    Send your Friend Signal Code to a friend. It contains only your Keeper ID and current public pet profile.

    Public profile sync is ready.
    DAILY REWARDS0 / 3 claimedOne reward per friend. Extra visits remain available without rewards.
    ×

    Remove Friend Signal?

    This friend will disappear from your visit list.
    FRIEND HABITAT

    Visiting a friend

    Hello!
    Welcome!
    Your visiting EchoYOUR ECHO
    Friend EchoFRIEND
    ✦✦
    OPENING FRIEND SIGNAL…
    FRIENDLY SIGNAL BATTLE

    Four-Clash Match

    1234
    Your battling EchoYOUR ECHO
    VS
    Friend EchoFRIEND

    Synchronising both signals…

    READY

    Offline match using the friend’s last shared profile. No pet can die or lose permanent Health here.
    REGION 01 · ADVENTURE SIGNAL

    The Fractured Garden

    SHARDS0

    Explore 36 signals. Every twelfth node contains a powerful guardian.

    0 / 36 CLEARED0%
    AvailableClearedBossLocked
    !

    Signal too fragile

    Your Echo is not strong enough to enter this region yet.
    ♢

    Crest resonance available

    This boss greatly exceeds your current signal level. Activate the Crest for this battle?

    Evolution remains unchanged. Crest power applies only to this boss battle, then recharges for 12 hours.
    !

    Reset Pet?

    Are you sure? Your pet will miss you!

    This permanently removes the current local pet and returns you to the Echo Core homepage. Display, battery and music preferences will stay unchanged.
    LINEAGE ARCHIVE

    Evolution concept board

    100%

    Double-tap the image to switch between 100% and 200%. Drag the enlarged image to inspect each form.