# Polarisetter: True North — Find true north for telescopes

> Find true north for telescopes (iPhone/iPad app by Yuki Noaki.)

- Source: https://appshunter.io/ios/app/polarisetter-true-north/id6766741368 (this page in markdown: same URL + `.md`)
- Developer: [Yuki Noaki](https://appshunter.io/developer/1690000643)
- Category: Navigation, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.6 · 1 MB
- Languages: American English, Japanese
- Released: 2026-05-08
- Data updated: 2026-06-12
- User reviews in markdown: https://appshunter.io/ios/app/polarisetter-true-north/id6766741368/reviews.md

## What is Polarisetter?

Polarisetter is a small companion app for setting up a telescope at night. It shows you true north (not magnetic north) and the device's level — on a single dark-sky-friendly screen — so you can polar-align your mount quickly in the dark.

Aligning an equatorial mount needs **true north**, not magnetic north. At the same time, the tripod has to sit **level**. Polarisetter brings both readouts together so you can finish the setup with fewer back-and-forth glances.

KEY FEATURES

• True North
  Combines the device's gyroscope and magnetometer with your latitude and longitude to correct for magnetic declination. Stripped down to what telescope setup actually needs — no map widgets, no clutter.

• Level Indicator
  Real-time tilt readout. Place the device on the mount head while extending the tripod legs and you'll know the moment it sits flat.

• Dark-Sky Friendly UI
  Black background with red text. Bright screens contract your pupils and cost you the dark adaptation that lets you see faint stars. Polarisetter uses the same red-light convention astronomers have followed for decades.

• Works Offline
  No network required. Your location is used only on-device to compute magnetic declination — it never leaves your phone.

WHO IT'S FOR

• Telescope users observing or imaging nebulae, clusters, planets
• Anyone who wants polar alignment to be less of a chore
• People who don't want a bright screen blasting their night vision
• Campers, hikers, and other outdoor folks who'd rather keep things dim

HOW TO USE

1. Open Polarisetter outdoors with a clear view of the sky.
2. Allow location access if prompted — your latitude and longitude are used only to compute true north (nothing is sent off-device).
3. Place the device on a level surface or mount head and align your telescope to the displayed bearing.

REQUIREMENTS

• iOS 15.6 or later
• Location access (used to compute true north)

About the developer
Built by an indie developer. Feedback and bug reports are welcome at karaage01@outlook.jp or @krgpi on X.


## Version history (last 1 release)

### 1.0 — 2026-05-08

No release notes.

## More apps by Yuki Noaki

- [DeskStick: Sync Sticky Notes](https://appshunter.io/ios/app/deskstick-sync-sticky-notes/id6449665256)

All apps by Yuki Noaki: https://appshunter.io/developer/1690000643

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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 2026-06-12.*