# Shortform Daily Book Summaries vs Training Interval Clock

The clearest difference is price: Shortform Daily Book Summaries at Free against Training Interval Clock's $0.99. Shortform Daily Book Summaries also leads on iOS requirement (15.0 vs 17.5). Training Interval Clock's advantage is in-app purchases (none vs 4). On update cadence, ads and device support there is nothing between them.

Shortform Daily Book Summaries is free to download; Training Interval Clock costs $0.99 up front. Shortform Daily Book Summaries sells 4 in-app purchases, starting at $23.99 per month. Training Interval Clock asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Shortform Daily Book Summaries | Training Interval Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.6 (1.4K ratings)](https://appshunter.io/ios/app/shortform-daily-book-summaries/id1489472007/reviews)** | — |
| Number of ratings | **1.4K** | — |
| Positive reviews | 31.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 2 MB |
| Requires iOS | **15.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Shortform Inc.](https://appshunter.io/developer/1489472006) | [kitakura kengo](https://appshunter.io/developer/1767983030) |

## What reviewers say

### Shortform Daily Book Summaries

[App page](https://appshunter.io/ios/app/shortform-daily-book-summaries/id1489472007)

Access high-quality book summaries and analyses that go beyond key ideas, offering comparative insights and interactive exercises. Learn essential lessons from bestsellers and classics, reinforced through audio narration and offline reading.

**Highlights:** 1-page summaries, Chapter-by-chapter analysis, Audio narrations, Interactive exercises, Highlighting and note-taking, Offline mode

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $23.99 | per month |
| Monthly | $23.99 | per month |
| Annual | $194.99 | per year |
| Annual | $194.99 | per year |

**What reviewers like**

- 💡 Excellent summaries with depth
- 👍 Great content and customer service
- 🚀 Fastest way to learn from books
- 🤓 Best book summaries on the market
- 👍 Helpful and balanced commentary

**What reviewers complain about**

- 🐛 Buggy app with poor UI/UX
- 💰 Extremely expensive subscription
- 🤖 Poor audio quality and narration
- 🔒 Deceptive billing practices
- 🤬 Terrible customer service

**Reported bugs**

- App crashes and freezes frequently
- Highlighting and bookmarking issues
- Inconsistent behavior when exiting app
- Search function is slow and unreliable
- App doesn't remember user's last position

**Requested features**

- Offline reading mode
- Ability to download summaries as PDFs
- Sync audio progress with text
- Improved search and navigation
- Highlight words being read in audio


### Training Interval Clock

[App page](https://appshunter.io/ios/app/training-interval-clock/id6677031974)

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

**In-app purchases:** none


## Frequently asked questions

### Is Shortform Daily Book Summaries free?

Shortform Daily Book Summaries is free to download, with in-app purchases available.

### Is Training Interval Clock free?

Training Interval Clock costs $0.99, with no in-app purchases.

### Do Shortform Daily Book Summaries or Training Interval Clock have ads?

Neither Shortform Daily Book Summaries nor Training Interval Clock shows ads.

### Which is updated more often, Shortform Daily Book Summaries or Training Interval Clock?

Shortform Daily Book Summaries ships an update every 3 weeks, and Training Interval Clock every 3 weeks. Most recently, Shortform Daily Book Summaries was updated on November 3, 2026 and Training Interval Clock on October 6, 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.*