Zeugiba app icon

Barometric altimeter for iPhone

Zeugiba: the dial your whole trail crew can read at a glance

Live altitude, station pressure and climb rate on an analogue face built for bright sun and deep shade. Mark the summits, passes and camps your group will talk about for years.

Download Zeugiba

Calibrate QNH at the trailhead, before the first switchback.

Pick your first setup, then copy it into the app

Every trail group has a favourite way to start a day. Choose one of three starter setups, copy its code and paste the value into Zeugiba once it is installed.

Zero-input start

Standard 1013.25 hPa

1013.25
  • Tap STANDARD 1013.25 on the QNH tab
  • Works as a common baseline for the whole group
  • Replace it later with a sharper value
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Match to elevation

Trailhead at 1091 m

TRAILHEAD-1091
  • Type a known elevation on the ELEVATION tab
  • Zeugiba derives QNH from a 5-second barometer sample
  • Keep the phone still while it samples
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Best first move

Calibrate before you climb

CALIBRATE-HERE
  • Open a saved mark, then tap CALIBRATE HERE
  • Every applied QNH stays in your calibration history
  • Pending 1026.9 hPa moves 787 m to 898 m in the preview
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These are reference setups for Zeugiba's own tools, not store discounts. Altitude is an estimate from air pressure. Not for aviation or navigation.

How the crew uses it on the trail

Zeugiba fits the way groups actually move: climb, pause, compare, mark. Here is what each stage looks like on the screen.

On the way up: ALT mode

  • Watch height gained or lost on the big dial as the slope changes.
  • Read climb rate to settle on a pace everyone can hold.
  • Raise the smoothing control on gusty ridges so wind noise stops shaking the numbers.
  • Switch metres and feet to match whoever brought the paper map.

At the rest stop: BARO mode

  • Hold position and watch station pressure shift while the group eats.
  • Open TREND to see the 3-hour tendency, from RISING FAST to FALLING FAST.
  • Read the plain-language weather hint before anyone decides to push on.
  • Drag the probe up the COLUMN tab to compare pressure, oxygen and water's boiling point.

At every landmark: marks

  • Hold the centre of the dial to save a mark in one gesture.
  • Tag it as summit, trailhead, pass, camp, water, viewpoint, floor or other.
  • Each mark keeps altitude, station pressure, QNH, trend and an optional photo.
  • Search by name or note, filter by tag and pin the spots you return to.

After the trip: stats

  • Compare highest, lowest and span across your marks.
  • See total climbed between marks and a proportional altitude ladder.
  • Review how many marks each tag collected.
  • Reopen any mark to see how far above or below you stand now.

Everything on the instrument panel

Six tools, one deep-navy interface with gold, teal and blue accents. Each one is labelled and iconised, so nothing relies on colour alone.

01 / DIAL

Analogue altimeter

A knurled steel bezel, white ticks and a large altitude readout in metres or feet, with station pressure and climb rate beneath.

02 / COLUMN

Atmospheric column explorer

Drag a probe through a cross-section of the atmosphere and read pressure, oxygen versus sea level and the boiling point of water at that height.

03 / MARKS

One-tap marks log

Save summits, passes, trailheads, camps, water sources and viewpoints with altitude, pressure, QNH, trend and a photo.

04 / TREND

Pressure tendency with hints

The 3-hour tendency is classified into clear states such as RISING FAST, STEADY and FALLING FAST, each with a short weather hint.

05 / CALIBRATE

QNH calibration three ways

Use the precision arc slider, derive QNH from a known elevation, or tap a saved reference point. A full history keeps every change.

06 / STATS

Climb stats and altitude ladder

Cumulative climb between marks, highest, lowest and span, plus a ladder whose spacing is proportional to real altitude.

Under the bezel: how a reading is made

Zeugiba reads the barometer built into your iPhone. Air thins as you climb, so pressure drops in a predictable way. The app converts that pressure into height using the standard ICAO atmosphere formula, then draws the result on the dial.

The number depends on sea-level pressure, called QNH. Weather moves it all day, so the app lets you correct it: slide the precision arc, enter a known elevation for a 5-second sample, or tap a saved reference point. Every applied value lands in your calibration history.

Because the result is derived from air pressure, it is an estimate for outdoor reference only. A front moving through can shift the reading while you stand still, which is exactly why BARO mode and the 3-hour tendency exist. Never use it for aviation, navigation or safety-critical decisions.

Verified Specifications
App nameZeugiba
PlatformiOS (iPhone)
CategoryUtilities
Version1.2
SensorBuilt-in barometer
Altitude modelICAO standard atmosphere
UnitsMetres or feet
ModesALT and BARO
Standard QNH1013.25 hPa
Tag types8
Store ID6824980609
App sizeNot listed in store data
Release noteImproved the app's internals.
Details checked14.11.2026

Put Zeugiba on your iPhone before the next summit push

iOS, iPhone. Price and download size are shown on the App Store page. Install takes a moment, and you can calibrate QNH right at the trailhead.

Download Zeugiba

Needs an iPhone with a built-in barometer. Altitude is an estimate. Not for aviation or navigation. Age rating and any in-app purchases are listed in the App Store.