Comparison

QtWS 2019 (QtWorldSummit) vs MLC Chat

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

Head to head
About

QtWS 2019 (QtWorldSummit)

Access schedules, speaker bios, and session abstracts for the Qt World Summit. Navigate event locations with an integrated floor map and personalize your experience by selecting favorite talks. This app is built with Qt and is cross-platform.

Highlights
  • Event schedule access
  • Speaker biographies
  • Session abstracts
  • Integrated floor map
  • Personalized talk selection
  • Cross-platform compatibility
Features
Read full description

The QtWS app -- Your window to the Qt World Summit - a Developer Example App See what kind of Apps can be developed using Qt 6.12 Explore QtWS2019for Trainings, Keynotes and Development Topics for Embedded, Desktop, Mobile Devices and more. QtWS2019 gives you access to old data from these Conferences (Berlin, Tokyo) - easy switch between the schedules Find up-to-date session abstracts, view the agenda at a glance, read the speaker bios and find your way around using the integrated floor-map. Create your own path through the event by selecting your favorite talks. Yup, the app is of course #BuiltwithQt using Qt Quick Controls and Qt 6.12. And it's cross-platform -- obviously. About QtWS: The 2019 Qt World Summit will happen in Berlin, November 04-06 and Tokyo, November 29

About

MLC Chat

Engage in conversations with open language models directly on your iPad or iPhone. Once a model is downloaded, all interactions occur locally, ensuring privacy and offline functionality without internet access. This app is designed for non-commercial use, allowing you to run various open-source language models on your device.

Highlights
  • Local AI model chat
  • Offline functionality
  • No internet required
  • Privacy-focused
  • Open-source project integration
  • Downloadable language models
Features
Read full description

MLC Chat lets users chat with open language models locally on ipads and iphones. After a model is downloaded to the app, everything runs locally without server support, and it works without internet connections do not record any information. Because the models run locally, it only works for the devices with sufficient VRAM depending on the models being used. MLC Chat is part of open source project MLC LLM, with allows any language model to be deployed natively on a diverse set of hardware backends and native applications. MLC Chat is a runtime that runs different open model architectures on your phone. The app is intended for non-commercial purposes. It allows you to run open-language models downloaded from the internet. Each model can be subject to its respective licenses.

Screenshots

QtWS 2019 (QtWorldSummit)4 screens
MLC Chat2 screens

Verdict

The call

The clearest difference is rating: QtWS 2019 (QtWorldSummit) at 5.0 against MLC Chat's 4.2. QtWS 2019 (QtWorldSummit) also leads on review sentiment (100% vs 68%) and update cadence (every 3 weeks vs every 2 months). MLC Chat's advantage is ratings volume (84 vs 1). On price, ads, in-app purchases and monetization model 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.

ReceptionRating · Positive reviews · Number of ratings

QtWS 2019 (QtWorldSummit) holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: MLC Chat has 84 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of QtWS 2019 (QtWorldSummit)'s written reviews are positive against 68% of MLC Chat's.

UpkeepUpdate frequency

QtWS 2019 (QtWorldSummit) ships an update every 3 weeks, MLC Chat every 2 months. The most recent releases landed on October 4, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
QtWS 2019 (QtWorldSummit) versus MLC Chat: the parameters behind the verdict, then further details
ParameterQtWS 2019 (QtWorldSummit)MLC Chat
PriceFreeFree
Rating5.0 (1 ratings) — better4.2 (84 ratings)
Positive reviews100.0% of reviews — better68.3% of reviews
Number of ratings184 — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS1817.0 — better
Further details — not scored
Size60 MB1.7 GB
Age rating4+17+
DeveloperEkkehard GentzTianqi Chen

Customer experience

QtWS 2019 (QtWorldSummit)

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

MLC Chat

All ratings78 ratings
Positive83.3%
Neutral3.8%
Negative12.8%
Written reviews63 reviews
Positive68.3%
Neutral12.7%
Negative19.0%

Bugs and requests

QtWS 2019 (QtWorldSummit)

Not enough reviews yet to summarise bugs or requests.

MLC Chat

Reported bugs

17 issues
  • Phi model crashes on iOS 26.0.1 17 Pro Max
  • App crashes on iPad Pro 4th Gen, iPadOs 17.7
  • RedPajama model crashes app on initialization
  • Update is extremely slow
  • Download model button disabled in new version
Show 12 more
  • RedPajama model crashes, custom model download removed
  • App closes when hitting send on iPhone 13
  • Conversation resets when app is backgrounded
  • Vicuna and Mistral 7B models cause crashes
  • Some 7b q4f16/q4f32 models crash on iPhone 15 Pro
  • App crashes on iPhone 13 mini
  • Cannot load other models from URL
  • Crash on iPhone 12
  • Severe heating and frequency reduction on A15
  • Low VRAM failed initialization on 3GB LP DDR4X phone
  • Cannot run 4bit model on iPhone 15 with 8GB RAM
  • Loading models from HF MLC official Repo causes crashes

Requested features

14 requests
  • Ability to import custom models (from URL/Hugging Face)
  • Support for more specific models (DeepSeek, Phi-2, Gemma 2B/7B, MoE Mixtral 8x7B, LLaVA)
  • History of conversations
  • iOS shortcuts support
  • Ability to export entire responses
Show 9 more
  • Information on VRAM requirements per phone/model
  • Ability to change system message/create custom profiles
  • Ability to edit responses and system prompt
  • Add coffee support
  • Delete downloaded models
  • Change settings per model (repetition penalties, temperature)
  • How-to guide for importing/recompiling LLMs
  • Estimate model compatibility before download
  • Support for CN and ZH languages

In-app purchases

None

QtWS 2019 (QtWorldSummit)

No in-app purchases

None

MLC Chat

No in-app purchases

Questions

Is QtWS 2019 (QtWorldSummit) free?
QtWS 2019 (QtWorldSummit) is free to download, with no in-app purchases.
Is MLC Chat free?
MLC Chat is free to download, with no in-app purchases.
Which has better reviews, QtWS 2019 (QtWorldSummit) or MLC Chat?
QtWS 2019 (QtWorldSummit) is rated higher. QtWS 2019 (QtWorldSummit) averages 5.0 out of 5 from 1 ratings, while MLC Chat averages 4.2 from 84 ratings.
Do QtWS 2019 (QtWorldSummit) or MLC Chat have ads?
Neither QtWS 2019 (QtWorldSummit) nor MLC Chat shows ads.
Which is updated more often, QtWS 2019 (QtWorldSummit) or MLC Chat?
QtWS 2019 (QtWorldSummit) ships an update every 3 weeks, and MLC Chat every 2 months. Most recently, QtWS 2019 (QtWorldSummit) was updated on October 4, 2026 and MLC Chat on October 24, 2026.

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