# LinkVault vs Confidence Interval Calc

The clearest difference is in-app purchases: Confidence Interval Calc at none against LinkVault's 2. Confidence Interval Calc also leads on iOS requirement (13.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. LinkVault sells 2 one-off in-app purchases. Confidence Interval Calc asks for nothing beyond the download.

LinkVault ships an update weekly, Confidence Interval Calc every 6 days. The most recent releases landed on September 17, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | LinkVault | Confidence Interval Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (9 ratings)](https://appshunter.io/ios/app/linkvault/id1592234033/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 30 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Liqiang Wang](https://appshunter.io/developer/1592234035) | [Arsosa Network Inc.](https://appshunter.io/developer/1209042440) |

## What reviewers say

### LinkVault

[App page](https://appshunter.io/ios/app/linkvault/id1592234033)

Organize and manage all your mobile links in one central location. Save links from various apps, add notes and tags for easy categorization, and quickly find them with a powerful search function. Back up your data securely with iCloud sync.

**Highlights:** Save links from any app, Organize with notes and tags, Efficient search functionality, Privacy-focused local storage, iCloud backup and sync, QR code scanning, Direct sharing from other apps

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me One Shot of Espresso | $1.99 | one-time |
| Coffee Latte | $3.99 | one-time |


### Confidence Interval Calc

[App page](https://appshunter.io/ios/app/confidence-interval-calc/id6749201174)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LinkVault free?

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

### Is Confidence Interval Calc free?

Confidence Interval Calc is free to download, with no in-app purchases.

### Do LinkVault or Confidence Interval Calc have ads?

Neither LinkVault nor Confidence Interval Calc shows ads.

### Which is updated more often, LinkVault or Confidence Interval Calc?

LinkVault ships an update weekly, and Confidence Interval Calc every 6 days. Most recently, LinkVault was updated on September 17, 2026 and Confidence Interval Calc on September 28, 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.*