Tideglass
Offline tide instrument
Free · Designed for iPad. Not verified for macOS.
Tideglass is a free, offline tide instrument for iPhone and Apple Watch. Designed like a vintage marine chronometer in brass and navy — no ads, no accounts, no internet required.
FEATURES
◆ ~8,000 tide stations worldwide, all bundled in the app
◆ Pannable 24-hour chart with a static centre cursor — swipe to scrub ±7 days, with a magnetic snap when you cross "now"
◆ 30-day histogram: every day's maximum high and minimum low as paired bars, with the spring/neap pulse plain to see
◆ 12-month envelope: a smoothed year-at-a-glance view of the highs and lows around your spot
◆ Top-5 tide rankings: see the biggest highs and deepest lows in any visible window
◆ Sunrise, sunset, moon phase, and your nearest station's name at a glance
◆ Mechanical-drum readout for time and water level, with selection haptics as you scrub
◆ Apple Watch standalone — runs without iPhone, same instrument feel on the wrist
PRIVACY
◆ Location is read only on device to find your nearest tide station — nothing is transmitted, stored, or shared
◆ No accounts, no analytics, no ads, no tracking
DATA
Tide harmonics derived from the open OpenWaters database (NOAA + TICON-4). Predictions are sub-hour accurate at most reference stations. Subordinate stations rely on time and height offsets from a parent station.
RECREATIONAL USE ONLY. Not for marine navigation. Always consult official hydrographic publications for safety-critical decisions.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What’s new in 1.2.2:
• Tide Curve widget: the “now” marker now stays centered while the tide scale scrolls beneath it, instead of drifting to the right edge and freezing.
• See the next tide at a glance — an up/down arrow and its time — along with the current water level, on both the Home Screen and Lock Screen.
The developer, Ivan Shestakov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ivan Shestakov
- Size
- 7.5 MB
- Category
- Weather
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Ivan Shestakov