# Altimeter Barometer : ISOBAR — GPS Elevation and Air Pressure

> GPS Elevation and Air Pressure (iPhone/iPad app by Aneesh Pradeep.)

- Source: https://appshunter.io/ios/app/altimeter-barometer-isobar/id6803479220 (this page in markdown: same URL + `.md`)
- Developer: [Aneesh Pradeep](https://appshunter.io/developer/1836157821)
- Category: Navigation, Weather
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.6 · 7 MB
- Languages: American English
- Released: 2026-09-25
- Data updated: 2026-09-28
- User reviews in markdown: https://appshunter.io/ios/app/altimeter-barometer-isobar/id6803479220/reviews.md

## What is Altimeter Barometer?

ISOBAR turns your iPhone into a precision altimeter and barometer. Every altitude it reports arrives with the one thing most apps leave out, an honest margin of error, so you always know how far to trust the number.

WHAT YOU GET

- One button, fifteen seconds, and an altitude you can defend
- Every reading carries its own uncertainty, shown in metres or feet
- Readings combine the barometric sensor, GPS and a terrain model
- Calibration against the nearest aviation weather station
- A pressure chart that shows weather turning before you feel it
- Storm alerts driven by real pressure change, not a forecast feed
- Works without a signal once terrain data is stored on the device

BUILT FOR THE OUTDOORS

- Track elevation gain across a hike, a climb or a ride
- Save waypoints for home, trailheads and camps
- Set a target height and watch the remaining climb count down
- Correct weather drift out of your elevation gain

FOR AVIATION AND WORK

- QNH, QFE and density altitude on one panel
- Cold temperature correction table
- Multi floor building survey with a floor by floor schedule
- Flight profile logging for a complete climb and descent record

UNDERSTAND THE AIR

- Ninety days of pressure history in one chart
- Nearest reporting station with the raw observation text
- Altitude physiology reference for high ground
- A personal sensitivity journal, which is not medical advice

CLEAR ANSWERS

- An AI assistant explains what your numbers mean in plain language
- It reads only the figures already on your screen

PRIVACY AND QUALITY

- No ads anywhere in the app and no advertising identifier
- No account, no sign in and no cloud sync
- Your measurements stay on your device
- No analytics SDK is bundled
- Only rounded coordinates leave the device, to fetch weather and terrain
- Deleting the app deletes your record with it

ISOBAR is built for hikers, climbers, cyclists, pilots, drone operators, surveyors, trades and anyone who wants a figure they can stand behind. It is made for recreational and professional situational use and is not a survey grade instrument.

A device with a barometric pressure sensor gives the most precise results. On devices without one, ISOBAR measures using GPS and the terrain model, and tells you exactly what is missing.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| ISOBAR Pro - Annual | $9.99 | per year |
| ISOBAR Pro - Monthly | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| ISOBAR Pro - Lifetime | $24.99 | one-time |



## Version history (last 1 release)

### 4 — 2026-09-25

No release notes.

## More apps by Aneesh Pradeep

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- [Expense Tracker AI : SpendIQ](https://appshunter.io/ios/app/expense-tracker-ai-spendiq/id6758729622)

All apps by Aneesh Pradeep: https://appshunter.io/developer/1836157821

## Related topics

[isobar](https://appshunter.io/ios/topics/isobar)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-28.*