# Blue Liner Flows vs LastDrop

The clearest difference is in-app purchases: LastDrop at none against Blue Liner Flows's 2. LastDrop also leads on iOS requirement (15.1 vs 17.6). Blue Liner Flows's advantage is update cadence (weekly vs every 3 months) and chart position (#191 vs unranked). On price, ads and device support there is nothing between them.

Both are free to download. Blue Liner Flows sells 2 in-app purchases, starting at $6.99 per year. LastDrop asks for nothing beyond the download.

Blue Liner Flows ships an update weekly, LastDrop every 3 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Blue Liner Flows | LastDrop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (42 ratings)](https://appshunter.io/ios/app/blue-liner-flows/id6464350766/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#191** | — |
| Size | 4 MB | 47 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ryan Olson](https://appshunter.io/developer/605279068) | [Alper Emin Yardimci](https://appshunter.io/developer/1874396613) |

## What reviewers say

### Blue Liner Flows

[App page](https://appshunter.io/ios/app/blue-liner-flows/id6464350766)

**Currently charting:** #191 Top Grossing · Weather (US App Store)

Access detailed USGS and NOAA river flow data, including discharge, temperature, and gauge height. Explore rivers with an interactive map, set custom tags for organization, and receive alerts for condition changes. Plan your outdoor activities with integrated weather forecasts.

**Highlights:** River flow data (discharge, temperature, pH), Interactive map with directions, Customizable stream tagging, Real-time condition alerts, Home screen widgets, Integrated weather forecasts

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Annual Subscription | $6.99 | per year |
| Premium Lifetime Edition | $19.99 | one-time |


### LastDrop

[App page](https://appshunter.io/ios/app/lastdrop-water-tracker/id6762549048)

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

**In-app purchases:** none


## Frequently asked questions

### Is Blue Liner Flows free?

Blue Liner Flows is free to download, with in-app purchases available.

### Is LastDrop free?

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

### Do Blue Liner Flows or LastDrop have ads?

Neither Blue Liner Flows nor LastDrop shows ads.

### Which is updated more often, Blue Liner Flows or LastDrop?

Blue Liner Flows ships an update weekly, and LastDrop every 3 months. Most recently, Blue Liner Flows was updated on October 25, 2026 and LastDrop on October 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.*