# TDU vs ideaShell

The clearest difference is review sentiment: ideaShell at 76% against TDU's 25%. ideaShell also leads on rating (4.7 vs 4.0) and update cadence (every 10 days vs every 3 months). TDU's advantage is in-app purchases (none vs 12) and iOS requirement (13.0 vs 15.0). On price and ads there is nothing between them.

Both are free to download. ideaShell sells 12 in-app purchases, starting at $4.99 per 7 days. TDU asks for nothing beyond the download.

ideaShell holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: ideaShell has 584 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 25% of TDU's written reviews are positive against 76% of ideaShell's.

TDU ships an update every 3 months, ideaShell every 10 days. The most recent releases landed on June 5, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | TDU | ideaShell |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/tdu/id491086360/reviews) | **[4.7 (584 ratings)](https://appshunter.io/ios/app/ideashellai-thinking-partner/id6478199476/reviews)** |
| Number of ratings | 2 | **584** |
| Positive reviews | 25.0% of reviews | **76.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 11 MB | 196 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Descuentos Universitarios de México (TDU)](https://appshunter.io/developer/491086363) | [RoundRedDot Inc](https://appshunter.io/developer/1732200510) |

## What reviewers say

### TDU

[App page](https://appshunter.io/ios/app/tdu/id491086360)

Discover permanent discounts of 10% to 50% at over 9,500 affiliated establishments nationwide. Find restaurants, hotels, boutiques, and more, with options for hot deals and location-based searches. Stay updated on new benefits through push notifications.

**Highlights:** Permanent discounts up to 50%, Over 9,500 affiliated establishments, National coverage in Mexico, Hot Deals and special promotions, Location-based establishment search, Push notifications for new benefits, User suggestions for new affiliations

**In-app purchases:** none


### ideaShell

[App page](https://appshunter.io/ios/app/ideashellai-thinking-partner/id6478199476)

Capture thoughts instantly with AI-powered voice notes. Transcribe, organize, and discuss ideas with AI to generate actionable content like to-do lists and summaries. Seamlessly integrate with other productivity apps.

**Highlights:** AI Voice Transcription, Automated Text Structuring & Optimization, Multiple Fast Entry Points (Watch, Siri, Widgets), AI Discussions & Summaries, Smart Card Content Creation (To-Do Lists, Scripts), Integration with Productivity Apps, Smart Q&A and Note Search

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ideaShell Week Subscription | $4.99 | per 7 days |
| Monthly Premium | $9.99 | per month |
| Monthly Premium Plus | $12.99 | per month |
| Monthly Premium Max | $39.99 | per month |
| Annual Premium | $79.99 | per year |
| Annual Premium Plus | $89.99 | per year |
| Annual Premium Max | $369.99 | per year |
| ideaShell Points(1M) | $3.99 | one-time |
| ideaShell Points(2M) | $6.99 | one-time |
| ideaShell Points(5M) | $15.99 | one-time |
| ideaShell Points(10M) | $29.99 | one-time |
| Lifetime_Premium | $99.99 | one-time |

**What reviewers like**

- 🎙️ Excellent voice transcription accuracy
- 🤖 High-quality AI summaries and insights
- 🎨 Beautiful and intuitive user interface design
- ⚡ Fast and efficient note-taking workflow
- 🏷️ Automatic tagging and organization

**What reviewers complain about**

- 💰 Expensive subscription-only pricing model
- 🔄 Lifetime subscription concerns about ownership
- 🔍 Search functionality is limited and not semantic
- 🐛 Constant vibration issues reported
- 📱 Compatibility issues with iPhone 16 Pro

**Reported bugs**

- Constant phone vibration when using the app
- AI message truncation - unable to see full responses
- App impossible to open on iPhone 16 Pro
- Vibration occurs even when idle on main screen
- Recent update breaks note distinction by using identical AI summaries

**Requested features**

- Full web clipping functionality (articles, images, audio, videos)
- Direct media file downloads from web content
- Automatic Notion export integration
- Web/Mac version for desktop editing
- Text formatting options (bold, italics, font types)


## Frequently asked questions

### Is TDU free?

TDU is free to download, with no in-app purchases.

### Is ideaShell free?

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

### Which has better reviews, TDU or ideaShell?

ideaShell is rated higher. TDU averages 4.0 out of 5 from 2 ratings, while ideaShell averages 4.7 from 584 ratings.

### Do TDU or ideaShell have ads?

Neither TDU nor ideaShell shows ads.

### Which is updated more often, TDU or ideaShell?

TDU ships an update every 3 months, and ideaShell every 10 days. Most recently, TDU was updated on June 5, 2026 and ideaShell on September 23, 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.*