# GaugeWatcher vs TowCalc

The clearest difference is in-app purchases: GaugeWatcher at none against TowCalc's 1. GaugeWatcher also leads on update cadence (weekly vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. TowCalc sells 1 one-off in-app purchase. GaugeWatcher asks for nothing beyond the download.

GaugeWatcher ships an update weekly, TowCalc every 2 weeks. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | GaugeWatcher | TowCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gaugewatcher/id6498313776/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free | — |
| Size | 37 MB | 3 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Althage](https://appshunter.io/developer/1631629264) | [InnovaLabWorks](https://appshunter.io/developer/1888514726) |

## What reviewers say

### GaugeWatcher

[App page](https://appshunter.io/ios/app/gaugewatcher/id6498313776)

Access real-time river flow data without needing an account or encountering advertisements. Discover nearby gauges, monitor flow rates, and save your preferred locations for quick access.

**Highlights:** Real-time river flow data, Discover nearby gauges, Check flow rates, Bookmark favorite gauges, No signup required, Ad-free experience

**Features:** macOS Compatibility

**In-app purchases:** none


### TowCalc

[App page](https://appshunter.io/ios/app/towcalc-trailer-weights/id6790220566)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TowCalc Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is GaugeWatcher free?

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

### Is TowCalc free?

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

### Do GaugeWatcher or TowCalc have ads?

Neither GaugeWatcher nor TowCalc shows ads.

### Which is updated more often, GaugeWatcher or TowCalc?

GaugeWatcher ships an update weekly, and TowCalc every 2 weeks. Most recently, GaugeWatcher was updated on October 17, 2026 and TowCalc on October 12, 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.*