# Tasks+Cal+Sync 4 vs ChatLLM

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.

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 24, 2026 respectively.

## The numbers

| Metric | Tasks+Cal+Sync 4 | ChatLLM |
| --- | --- | --- |
| Price | $14.99 | **Free** |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/tasks-plus-cal-plus-sync-4/id1166018485/reviews) | **[4.9 (3.8K ratings)](https://appshunter.io/ios/app/chatllm-ai-chat-bot-and-agent/id6502844681/reviews)** |
| Number of ratings | 2 | **3.8K** |
| Positive reviews | — | 63.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 4 days** |
| Monetization | **Paid** | Subscription |
| Size | 8 MB | 112 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Lukas Zeller](https://appshunter.io/developer/299521020) | [Abacus.AI](https://appshunter.io/developer/1747006654) |

## What reviewers say

### Tasks+Cal+Sync 4

[App page](https://appshunter.io/ios/app/tasks-plus-cal-plus-sync-4/id1166018485)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ChatLLM

[App page](https://appshunter.io/ios/app/chatllm-ai-chat-bot-and-agent/id6502844681)

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.

**Highlights:** 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

**Features:** Safari Extension

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Monthly subscription | $9.99 | per month |
| Pro Tier | $19.99 | per month |

**What reviewers like**

- 💰 Cheap and powerful
- 🔥 Amazing best on the market by far
- 🔥 Abacus ai - Absolutely fabulous tool great work horse, The best value on the market
- 🔥 The best of AI capabilities into a single, seamless platform!
- 🔥 Super impressive app

**What reviewers complain about**

- 🚫 No account creation
- 📏 Can't adjust font size
- 🚫 Doesn't show routing. Doesn't transcribe audio
- 🐛 Voice chat is not transcribing. I need it. Sometimes I can reenter the thread and it will be there, and then vanish!
- 🚫 Function but ugly and missing clean ui/ux design

**Reported bugs**

- 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**

- 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


## Frequently asked questions

### Is Tasks+Cal+Sync 4 free?

Tasks+Cal+Sync 4 costs $14.99, with no in-app purchases.

### Is ChatLLM free?

ChatLLM is free to download, with in-app purchases available.

### Which has better reviews, Tasks+Cal+Sync 4 or ChatLLM?

ChatLLM is rated higher. Tasks+Cal+Sync 4 averages 1.0 out of 5 from 2 ratings, while ChatLLM averages 4.9 from 3.8K ratings.

### Do Tasks+Cal+Sync 4 or ChatLLM have ads?

Neither Tasks+Cal+Sync 4 nor ChatLLM shows ads.

### Which is updated more often, Tasks+Cal+Sync 4 or ChatLLM?

Tasks+Cal+Sync 4 ships an update every 20 months, and ChatLLM every 4 days. Most recently, Tasks+Cal+Sync 4 was updated on October 16, 2026 and ChatLLM on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*