Comparison

Open MobileUI vs PileStack

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

Head to head
About

Open MobileUI

This native mobile client allows you to connect to your self-hosted AI models via Open WebUI. Chat with your AI, manage conversations, and utilize features like web search and image generation, all while maintaining control over your data with no ads.

Highlights
  • Connect to self-hosted AI models
  • Real-time streaming responses
  • Edit and regenerate AI responses
  • Attach photos, files, and web pages
  • Voice mode for hands-free interaction
  • Organize chats with folders and archives
  • Export and share conversations
Features
Read full description

Open MobileUI is an open-source, native iPhone client for Open WebUI. Connect to your self-hosted server and chat with your AI models on the go: local Ollama models, OpenAI-compatible APIs, or any LLM your Open WebUI admin has set up. Your server, your data. The app connects directly to the Open WebUI server you choose. We do not run any backend that receives, stores or processes your chats, and there are no ads. CONNECT THE WAY YOU HOST • Home lab, VPS or company server • Private networks and Tailscale, including plain HTTP addresses for local setups • Custom domains behind a reverse proxy such as Nginx, Caddy or Traefik • Encrypted HTTPS and WSS connections • Sign in with email and password, LDAP, SSO (OpenID Connect), Google, Microsoft or GitHub CHAT • Real-time streaming responses • Edit and regenerate responses • Switch between AI models in one tap • Attach photos, camera shots, files, web pages and knowledge bases • Web search, image generation and code interpreter when your server enables them • Rich rendering: Markdown, code highlighting, math formulas and source citations • Voice mode: talk to your assistant hands-free and hear the answers read aloud • Voice dictation for your messages • Temporary chats that are not saved ORGANIZE • Folders, pinned chats, search and archive • Share chats and export them BUILT FOR IPHONE • Native performance, smooth animations and gestures • Light, dark and system themes • Smart keyboard handling • Graceful handling of network interruptions • Available in English, German, Spanish, French, Portuguese, Russian, Chinese, Japanese and Romanian PERFECT FOR • Using your self-hosted AI assistant on the go • Privacy-conscious users who want full control over their data • Teams that need mobile access to their company AI assistant REQUIREMENTS Open MobileUI does not host models or provide an AI service. It connects to an Open WebUI server that you or your organization run. Available features depend on your server settings. OPEN SOURCE Open MobileUI is free and open source under the GPL-3.0 license. For support, issues and source code: https://github.com/RonasIT/open-webui-react-native Disclaimer: Open MobileUI is an independent, third-party application. It is not affiliated with the Open WebUI, Ollama or Tailscale projects.

About

PileStack

Save articles, videos, recipes, and links from anywhere into a unified library. Organize your saved content with custom collections and easily find what you need. Get reminders for old saves to make your content useful.

Highlights
  • Save articles, videos, and links
  • Customizable collections
  • Drag-and-drop reordering
  • Search saved content
  • Mark items as read
  • Reminders for old saves
  • Syncs via iCloud
Features
Read full description

PileStack is your personal library for everything you find online. SAVE SMARTER Clip articles, videos, recipes, and links from anywhere. Everything goes into one unified library organized exactly how you want it. ORGANIZE YOUR WAY Create custom collections to group related content. Drag to reorder. Search to find. Your library, your rules. NEVER FORGET AGAIN Mark items as read. Get reminded of content you saved months ago. PileStack brings old saves back to life so you actually use them. SYNC EVERYWHERE Your library syncs seamlessly across iPhone and iPad via iCloud. Pick up where you left off on any device. SIMPLE & FAST No clutter. No paywalls. Just a clean, intuitive app that gets out of your way and lets you focus on what matters. PERFECT FOR - Writers and researchers gathering inspiration - Designers curating ideas - Readers who save articles but forget them exist - Anyone tired of bookmark graveyards - People who want their saved content to actually be useful Your pile of saved content, finally organized. Privacy Policy - https://pilestack.app/privacy.html Terms of Use - https://pilestack.app/terms.html

Screenshots

Open MobileUI4 screens
PileStack4 screens

Verdict

The call

The clearest difference is review sentiment: PileStack at 100% against Open MobileUI's 20%. PileStack also leads on rating (5.0 vs 3.8). Open MobileUI's advantage is in-app purchases (none vs 3) and ratings volume (34 vs 2). On price, update cadence, ads 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. PileStack sells 3 in-app purchases, starting at $1.99 per 7 days. Open MobileUI asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PileStack holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Open MobileUI has 34 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 20% of Open MobileUI's written reviews are positive against 100% of PileStack's.

UpkeepUpdate frequency

Open MobileUI ships an update weekly, PileStack every 4 days. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

Scorecard5 real differences · 5 level
Open MobileUI versus PileStack: the parameters behind the verdict, then further details
ParameterOpen MobileUIPileStack
PriceFreeFree
Rating3.8 (34 ratings)5.0 (2 ratings) — better
Positive reviews20.0% of reviews100.0% of reviews — better
Number of ratings34 — better2
Update frequencyWeeklyEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone, iPad — better
Requires iOS16.4 — better17.6
Further details — not scored
Size64 MB14 MB
Age rating4+4+
DeveloperRonas IT OUTemuri Chitashvili

Customer experience

Open MobileUI

All ratings28 ratings
Positive57.1%
Neutral3.6%
Negative39.3%
Written reviews10 reviews
Positive20.0%
Neutral0.0%
Negative80.0%

PileStack

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Open MobileUI

No in-app purchases

3 purchases

PileStack

Subscriptions3
  • PileStack Pro Weekly$1.997 Days
  • PileStack Pro Monthly$2.991 Month
  • PileStack Pro Yearly1 Month trial$17.991 Year

Questions

Is Open MobileUI free?
Open MobileUI is free to download, with no in-app purchases.
Is PileStack free?
PileStack is free to download, with in-app purchases available.
Which has better reviews, Open MobileUI or PileStack?
PileStack is rated higher. Open MobileUI averages 3.8 out of 5 from 34 ratings, while PileStack averages 5.0 from 2 ratings.
Do Open MobileUI or PileStack have ads?
Neither Open MobileUI nor PileStack shows ads.
Which is updated more often, Open MobileUI or PileStack?
Open MobileUI ships an update weekly, and PileStack every 4 days. Most recently, Open MobileUI was updated on November 9, 2026 and PileStack on November 5, 2026.

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