Comparison

Sound Union vs LLMster

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

Head to head
About

Sound Union

Features
Read full description

Sound Union is the first private club for musicians and music lovers that combines the best of music studios and co-work spaces. With Sound Union, your All-Access membership provides entry to a private music-inspired play space and workspace, with professionally equipped rehearsal rooms, podcast studio, collaboration studios, small studios and a post-production suite, all for the price of a monthly membership. All you have to do is bring your instrument, voice and good vibes. We provide all the amplifiers, mics, drums, keyboards and more. You'll also have access to a variety of amenities, including high-speed internet, coffee, tea, sodas, energy drinks, water, snacks and more. Whether you're a solo artist looking to expand your musical horizons, start a podcast, refine your skills, or part of a band, Sound Union is the perfect place for you to join a community of like-minded people who want a place to learn, create and collaborate. Sound Union also offers a private Audience Membership that allows unlimited evening access from 5:00 p.m. - 11:00 p.m. Audience members can attend exclusive private house concerts and relax in our club before or after a night on the town while enjoying complimentary beverages and snacks. Sound Union is located in downtown Redwood City, CA at 2625 Broadway Street. And is open to members seven days a week from 10:00 a.m. to 11:00 p.m. Here are some of the features of SoundUnion: - Fully equipped music studios for rehearsal, jam sessions and clinics. - Community of music makers to connect with and collaborate with. - Plug-and-play podcast studio with room for up to four people. - Amenities include high-speed internet, coffee, tea, energy drinks, water, snacks and more. - Musician and audience membership options. - Weekly private performances by local and traveling artists in our “Loft” club space. - Almost 10,000 square feet of music inspired space for gathering, playing, working and relaxing. Become a member of Sound Union today and start creating the best music of your life!

About

LLMster

Connect to local AI models running on your server for private, fast conversations. Stream replies, reasoning, and image-based interactions. Organize, back up, and restore your chat library securely.

Highlights
  • Connects to local LM Studio servers
  • Private by design, no cloud relay
  • Organize chats by model, folder, or pin
  • Backup and restore chat library
  • Supports vision models with image input
  • Hands-free voice chat with on-device speech recognition
  • Customizable system prompts and tool integrations per chat
Features
Read full description

LLMster is a fast, private iPhone and iPad client for models running on your LM Studio server (https://lmstudio.ai). Stream replies, reasoning, tool activity, and image-based conversations from the models you host—in an app designed to feel at home on iOS. Private by design LLMster connects directly to the server you choose. There’s no LLMster account, telemetry, hosted chat service, or cloud relay in the middle. Your conversation library stays on your device, while model context stays with your configured server. External integrations run only when you choose to enable them. Your models, wherever you run them Keep your models on the machine built for them: a workstation, home server, or always-on computer. Run the LM Studio desktop app or LM Studio’s headless daemon, point LLMster at the host, and start chatting. No companion desktop client is required. Choose the right model without leaving the conversation: • Search or sort by name, size, or format, then pin favorites • See which models support vision, reasoning, or tool calls • Change models without starting a new chat Organized from the start Search chats by title, model, or folder. Browse recent conversations across every folder, then organize, rename, pin, or duplicate important threads. Move and protect your chats Share individual conversations as .llmster files and import them on another device while preserving messages, images, reasoning, tool history, and chat settings. Back up and restore your entire local chat library—including folders, pins, drafts, and attachments—with optional password protection. Backups do not include server addresses, authentication keys, or app-wide settings. LLMster also verifies transferred response context against your configured LM Studio server before continuing a chat. Vision, direct to your server Attach up to four screenshots, photos, or scanned pages to a message and send them to a compatible vision model. LLMster resizes and compresses images on your device before sending them, so the originals remain with you. Open any attachment and pinch to zoom when you need to inspect the details. Hands-free voice chat Talk naturally using on-device speech recognition and text-to-speech. Audio stays on your device; only the resulting text is sent to your configured server. Natural turn-taking and subtle haptics keep the conversation moving without touching the screen. Control each conversation Every chat can have its own: • Integrations already configured in LM Studio • Custom system prompt • Tool-call visibility • Live reasoning preference Stream reasoning as Markdown while the model works, or keep the interface quiet with a compact Thinking indicator and open the completed reasoning when you want it. Control response auto-scrolling, and choose System, Light, or Dark appearance with your preferred accent color. Rich responses, as they arrive LLMster renders streaming Markdown smoothly, including syntax-highlighted code with copy controls, inline and block math, tables, links, lists, and more. Export or share transcripts with their original Markdown intact. Keep going while you move on Run LM Studio on a workstation or headless server and connect from your phone. With Tailscale on both devices, you can keep chatting over cellular or another Wi-Fi network while your models run at home. Setup instructions are available at https://llmster.app/support

Screenshots

Sound Union4 screens
LLMster4 screens

Verdict

The call

The clearest difference is update cadence: LLMster at every 10 days against Sound Union's every 14 months. Sound Union's advantage is iOS requirement (13.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sound Union ships an update every 14 months, LLMster every 10 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Sound Union versus LLMster: the parameters behind the verdict, then further details
ParameterSound UnionLLMster
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 14 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.4 — better26.0
Further details — not scored
Size160 MB10 MB
Age rating4+4+
DeveloperSound Union, Inc.Dave Sebek

In-app purchases

None

Sound Union

No in-app purchases

None

LLMster

No in-app purchases

Questions

Is Sound Union free?
Sound Union is free to download, with no in-app purchases.
Is LLMster free?
LLMster is free to download, with no in-app purchases.
Do Sound Union or LLMster have ads?
Neither Sound Union nor LLMster shows ads.
Which is updated more often, Sound Union or LLMster?
Sound Union ships an update every 14 months, and LLMster every 10 days. Most recently, Sound Union was updated on October 30, 2026 and LLMster on October 31, 2026.

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