Tasks+Cal+Sync 4 vs ChatLLM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tasks+Cal+Sync 4
This app synchronizes contacts, tasks, and calendars using the SyncML standard. It's designed for users who need to connect with older systems or specific organizational requirements that rely on this legacy synchronization technology.
- SyncML synchronization for contacts, tasks, and calendars
- App-internal calendar and task management
- iOS contact group assignment
- Acts as a local SyncML server
- Month, day, week, and list calendar views
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Please read the following desciption before buying this app! Tasks+Cal+Sync 4 is a niche app, suitable only when you need synchronizing contacts, tasks and calendar with a server or service which uses a standard called SyncML. The app does not support any other synchronisation technology! So please buy this app only if you know for sure that SyncML-based synchronisation is really what you need! This may be the case when the IT people of your organisation say so, and maybe even explicitly recommend using Tasks+Cal+Sync to synchronize calendars, tasks and contacts. In any case, please realize that for using this app, you need to know the URL of your syncml server, the login user to use, and the so called server paths for contacts/tasks/calendar. Only the provider of the SyncML service knows these details and can support you in establishing sync with his SyncML server. We as makers of the SyncML client app cannot! By now, SyncML is a legacy standard. It was invented in 2000, and many of that time's feature phones did support it. Since then, it has been largely superseded by other technologies, most notably CalDAV and CardDAV, which iOS supports out of the box without any extra app. But SyncML still exists, and for some older calendaring systems, it may be the only way to synchronize. For those cases, Tasks+Cal+Sync 4 exists. Tasks+Cal+Sync 4 is a rework of the former Tasks+Cal+Sync app, to allow using SyncML on iOS 10 and later (the original Tasks+Cal+Sync app only works up to iOS 9). But please note that Tasks+Cal+Sync 4 does not provide new features over the original Tasks+Cal+Sync - except for a contact list view with a way to easily assign contacts to groups. Otherwise Tasks+Cal+Sync 4 just carries the original Tasks+Cal+Sync functionality forward to make it usable with iOS10 and later. So now that you are certain SyncML based synchronisation is what you need - here's the summary for Tasks+Cal+Sync 4: • based on a mature and extensively interoperability tested SyncML engine, which powers many SyncML client and server products for different platforms (libsynthesis). • synchronizes app-internal calendar (not the iOS calendar! If you want that, have a look at "SyncML PRO 4"), app-internal tasks (not iOS reminders!) and iOS contacts to a SyncML compliant server or service in the internet or in the local network. • can act as SyncML server in the local WiFi network (e.g. to keep really old mobiles in sync with an iOS device) • has built-in tasks, month, day, week and list views for the iOS calendar (same as in original Tasks+Cal+Sync) • has a contacts list for the iOS contacts, and allows quickly assigning/removing contact group membership (that's a new feature in Tasks+Cal+Sync 4) Please visit the plan44.ch web page (see support link below) for support and FAQ, as well as documentation for download.
ChatLLM
Access multiple advanced AI models for chat, content creation, and task automation. Features include an autonomous AI agent, real-time meeting transcription, and voice interaction. Generate images, videos, and code, or analyze documents with this comprehensive AI assistant.
- Autonomous AI agent for complex tasks
- Real-time meeting transcription and insights
- Multi-model AI chat (GPT-5, Opus, Gemini)
- Image and video generation
- Voice chat with multiple AI voices
- AI-powered web research
- Code execution and debugging
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ChatLLM – The Most Powerful AI Assistant on Mobile Chat, Create, Listen & Automate with State-of-the-Art AI ChatLLM brings together the world's best AI models — GPT-6.1, Fable 5.1, Opus 5.5, Gemini, DeepSeek, and more — into one app. Chat naturally, generate images and videos, transcribe meetings live, or let the AI Agent autonomously handle complex tasks for you. AGENT — AUTONOMOUS AI AGENT Give the Agent a task and watch it work. It uses multiple AI models, browses the web, writes code, and connects to your tools to complete complex multi-step tasks autonomously. • Research, analyze, and compile reports • Build and deploy websites and apps • Connect to Gmail, Google Drive, Jira, Slack, and more • Track progress with real-time task updates AI LISTENER — REAL-TIME MEETING INTELLIGENCE Record any conversation and get live AI-powered transcription and insights. • Real-time transcription in 100+ languages • AI-generated suggestions while you listen • Automatic session summaries • Custom analysis templates (Key Points, Technical Analysis, or your own) • Chat with AI about any past session • Background recording — switch apps without losing audio ADVANCED AI CHAT Natural, human-like conversations powered by 15+ language models. Ask questions, brainstorm, debug code, or tackle any topic. VOICE CHAT Full voice conversations with AI. Choose from multiple voices, switch between automatic and manual recording modes, and go hands-free. IMAGE & VIDEO GENERATION Turn text into visuals with Nano Banana Pro, FLUX, GPT Image 2.5, Seedream 5, Ideogram, Recraft, and more. Generate videos with Seedance 2.5, Veo 3.1, Kling AI, and Sora 2. DEEP RESEARCH AI-powered web research with source citations. Get comprehensive, multi-source answers to complex questions with real-time activity tracking. CODE EXECUTION Run code directly in chat. Debug, generate snippets, and test ideas with a built-in terminal and playground. DOCUMENT ANALYSIS Upload files for instant summaries, Q&A, and analysis. Supports PDFs, images with OCR, and more. PERSONALIZATION • Custom instructions for tailored responses • Memory system that learns your preferences • Projects to organize conversations and files • Thinking mode for complex reasoning 15+ AI MODELS IN ONE APP GPT-6.1 · Claude Fable 5.1 · Claude Opus 5.5 · Gemini · DeepSeek · Kimi · Grok · Qwen · Perplexity · and more Why Choose ChatLLM? • All the best AI models, one subscription • Multi-modal: Text, Voice, Images, Video, Documents • AI Agent for autonomous task completion • AI Listener for meeting intelligence • SOC-2 and HIPAA compliant — your data stays private This app requires a subscription. Plans start at $9.99/month. Terms of service & privacy policy: https://abacus.ai/terms https://abacus.ai/privacy
Screenshots
Verdict
The clearest difference is price: ChatLLM at Free against Tasks+Cal+Sync 4's $14.99. ChatLLM also leads on rating (4.9 vs 1.0) and update cadence (every 4 days vs every 20 months). Tasks+Cal+Sync 4's advantage is in-app purchases (none vs 3) and iOS requirement (10.0 vs 17.0). On 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
ChatLLM is free to download; Tasks+Cal+Sync 4 costs $14.99 up front. ChatLLM sells 3 in-app purchases, starting at $9.99 per month. Tasks+Cal+Sync 4 asks for nothing beyond the download.
ChatLLM holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: ChatLLM has 3.8K ratings behind it against 2, so its average is the more settled of the two.
Tasks+Cal+Sync 4 ships an update every 20 months, ChatLLM every 4 days. The most recent releases landed on October 16, 2026 and October 23, 2026 respectively.
| Parameter | Tasks+Cal+Sync 4 | ChatLLM |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 1.0 (2 ratings) | 4.9 (3.8K ratings) — better |
| Positive reviews | — | 63.6% of reviews |
| Number of ratings | 2 | 3.8K — better |
| Update frequency | Every 20 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 8 MB | 112 MB |
| Age rating | 4+ | 12+ |
| Developer | Lukas Zeller | Abacus.AI |
Customer experience
Tasks+Cal+Sync 4
ChatLLM
Bugs and requests
Tasks+Cal+Sync 4
Not enough reviews yet to summarise bugs or requests.
ChatLLM
Reported bugs
5 issues- Voice chat is not transcribing
- Chats disappearing after re-entering the thread
- App freezing or becoming laggy when generating responses on mobile
- Voice chat not working
- App crashing on mobile
Requested features
11 requests- Add transcript to the headphone mode
- Rename a thread
- Add execution time and other metrics for each request
- Indicate which LLM served the request when using routeLLM
- Add an iPad version
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- Add ability to delete chats on mobile
- Add voice chat and talk back feature
- Improve copy/paste functionality
- Allow selecting text
- Add ability to set default LLM
- Improve font size customization
In-app purchases
Tasks+Cal+Sync 4
No in-app purchases
ChatLLM
- Monthly Subscription$9.991 Month
- Monthly subscription$9.991 Month
- Pro Tier$19.991 Month
Questions
Is Tasks+Cal+Sync 4 free?
Is ChatLLM free?
Which has better reviews, Tasks+Cal+Sync 4 or ChatLLM?
Do Tasks+Cal+Sync 4 or ChatLLM have ads?
Which is updated more often, Tasks+Cal+Sync 4 or ChatLLM?
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