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River Ruler: Length & Map

River Ruler: Length & Map

Kayak, hiking & world rivers

2 ratings
2 reviews
✈️ Travel
Free
In-App Purchases

Details

  • Released
  • Updated
  • July 29, 2026
  • September 2, 2026

Features

Developer

Alex Pupko
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River Ruler: Length & Map screenshot #1 for iPhone
River Ruler: Length & Map screenshot #2 for iPhone
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River Ruler: Length & Map screenshot #6 for iPhone
River Ruler: Length & Map screenshot #7 for iPhone
iphone
ipad
🧾$4.99
In-App Purchase↘︎
⭐2
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📝7+ tags
Tags↘︎
❓8 answered
FAQ↘︎
📦~ in 6 days
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About

Measure river lengths precisely by following the actual riverbed, not a straight line. Get detailed trip data like flow, gradient, and estimated travel times for various watercraft and on foot. Export your measurements in multiple formats for GPS devices and mapping software.

✓Measure river length along riverbed
✓View river source to mouth
✓Find rivers by name or coordinates
✓Analyze sinuosity, gradient, and discharge
✓Estimate travel time for kayak, SUP, or walking
✓Export measurements as GPX, KML, or PDF
✓Save measurement logs
Show original description

What's New in River Ruler

1.4

September 2, 2026

New • The app now speaks eight more languages: Swedish, Danish, Finnish, Norwegian, Dutch, Polish, Czech and Traditional Chinese. Improved • Pins snap to the river. You no longer have to hit a narrow channel exactly with your finger. • Wide rivers measure from the bank — the app widens its search until it finds the channel instead of saying there is no river nearby. • The map recovers on its own after a network hiccup. Before, it stayed grey until you restarted the app. Fixed • Taking the free measurements offered on the purchase screen now continues your measurement. Your two points stay where you put them.

More
1

In-App Purchases

$4.99

RiverRuler lifetime

RiverRuler lifetime pro unlock

User reviews

Most RecentHighest RatedLowest Rated

Pretty nice!

very simple and useful app
школололоташколололота

Response from developer

Thanks for your feedback!

Не работает

Заплатил, но мерить маршрут приложение не хочет, долго крутит загрузку и в итоге на мой плохой интернет ссылается. Чушь.
добряк_тидобряк_ти

Response from developer

Hi! Thanks for the honest feedback. We're a young app and we keep making it better with every update. In version 1.2 measuring is noticeably more reliable: if the map server is slow, the app now retries automatically through another server, already-loaded data isn't re-downloaded, and wide rivers like the Mississippi need far fewer requests. You can get a refund anytime via Apple: reportaproblem.apple.com → "Request a refund". And after the refund, email us at tenkapp@proton.me — we'll gladly gift you a promo code so you can try 1.2 for free. Здравствуйте! Спасибо за честный отзыв. Мы только начинаем развивать сервис и с каждым обновлением стараемся делать его лучше. В версии 1.2 замер стал заметно надёжнее: если сервер карт отвечает медленно, приложение само повторяет запрос через другой сервер, уже загруженное не качается заново, а широким рекам вроде Миссисипи нужно куда меньше запросов. Возврат можно оформить через Apple: reportaproblem.apple.com → «Запросить возврат». А после возврата напишите нам на tenkapp@proton.me — с радостью подарим промокод, чтобы попробовать 1.2 бесплатно.

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FAQ

How does River Ruler measure river length?

River Ruler measures river length by precisely following the actual riverbed, accounting for every bend and curve, rather than drawing a straight line between two points. This provides a more accurate measurement for your paddling or hiking trips.

What kind of data does River Ruler provide about a river section?

River Ruler provides comprehensive data including sinuosity, gradient, elevation drop, discharge, basin area, flow direction, and estimated travel time for kayak, SUP, or walking. This helps users understand the river's characteristics and plan their journey.

Can I use River Ruler measurements with my GPS device?

Yes, River Ruler allows you to export your measurements in GPX format, which is compatible with most GPS devices. You can also export as KML for Google Earth, PDF, or a ready-to-send image.

Does River Ruler require an account or sign-up?

No, River Ruler does not require an account or sign-up to use its features. You can start measuring rivers immediately after downloading the app.

Does River Ruler have ads?

No, River Ruler is ad-free. The app explicitly states 'no ads' in its description, ensuring an uninterrupted user experience.

What platforms is River Ruler available on?

River Ruler is available on iPhone and iPad, as indicated by the supported devices list. It is designed for Apple's mobile operating systems.

How often is River Ruler updated?

The latest version of River Ruler is 1.2, which was last updated on August 21, 2026. This indicates a recent update, suggesting ongoing development and support for the application.

What is the age rating for River Ruler?

River Ruler has an age rating of 4+. This means it is suitable for users aged 4 and above, making it accessible for a wide range of younger and older users interested in its features.