# Mark Sheet App "Smart Mark" vs Training Interval Clock

The clearest difference is price: Mark Sheet App "Smart Mark" at Free against Training Interval Clock's $0.99. Mark Sheet App "Smart Mark" also leads on update cadence (every 10 days vs every 3 weeks) and iOS requirement (11.0 vs 17.5). Training Interval Clock's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support there is nothing between them.

Mark Sheet App "Smart Mark" is free to download; Training Interval Clock costs $0.99 up front. Mark Sheet App "Smart Mark" sells 3 in-app purchases, starting at $1.99 per month. Training Interval Clock asks for nothing beyond the download.

Mark Sheet App "Smart Mark" ships an update every 10 days, Training Interval Clock every 3 weeks. The most recent releases landed on September 12, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Mark Sheet App "Smart Mark" | Training Interval Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Size | 42 MB | 2 MB |
| Requires iOS | **11.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shinya Yamada](https://appshunter.io/developer/1358594694) | [kitakura kengo](https://appshunter.io/developer/1767983030) |

## What reviewers say

### Mark Sheet App "Smart Mark"

[App page](https://appshunter.io/ios/app/mark-sheet-app-smart-mark/id1662212709)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Smart Mark プレミアム（月額プラン） | $1.99 | per month |
| Smart Mark プレミアム（半年プラン） | $9.99 | per 6 months |
| Smart Mark プレミアム（買い切りプラン） | $22.99 | one-time |


### 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 Mark Sheet App "Smart Mark" free?

Mark Sheet App "Smart Mark" 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 Mark Sheet App "Smart Mark" or Training Interval Clock have ads?

Mark Sheet App "Smart Mark" shows ads; Training Interval Clock does not.

### Which is updated more often, Mark Sheet App "Smart Mark" or Training Interval Clock?

Mark Sheet App "Smart Mark" ships an update every 10 days, and Training Interval Clock every 3 weeks. Most recently, Mark Sheet App "Smart Mark" was updated on September 12, 2026 and Training Interval Clock on September 18, 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.*