Astro Locator vs E Ink CP Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Astro Locator
This app assists astronomers in quickly and easily achieving polar alignment for their telescopes. It helps locate key stars like Polaris or Sigma Octantis, displaying essential astronomical data for setup and viewing. Ideal for mobile astronomers who frequently set up and pack down their equipment.
- Quick polar alignment
- Locate Polaris/Sigma Octantis
- Display elevation, latitude, longitude
- Show moon phase
- Sunrise/sunset times
- Astro twilight times
- Today Extension widget
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Spend less time setting up and more time observing. Astro Locator helps you quickly and accurately polar align your equatorial mount by showing the precise position of Polaris or Sigma Octantis. Designed for both visual astronomy and astrophotography, it makes polar alignment fast, simple and reliable wherever you observe. Whether you’re setting up in your garden or under dark skies, Astro Locator provides all the information you need on a single, easy-to-read screen. Features include: • Accurate Polaris and Sigma Octantis positioning • Compass direction and correct elevation for your location • Latitude, longitude and altitude • UTC and local time • Sunrise and sunset times • Astronomical twilight start and end times • Current moon phase • Clean, uncluttered interface designed for fast setup Astro Locator is ideal for astronomers who assemble and pack away their equipment for each observing session, helping you spend less time setting up and more time enjoying the night sky. Trusted by amateur astronomers since 2014.
E Ink CP Tools
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The CP Tools For E Ink's Customers
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Verdict
The clearest difference is price: E Ink CP Tools at Free against Astro Locator's $3.99. E Ink CP Tools also leads on iOS requirement (12.0 vs 18.0). On update cadence, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
E Ink CP Tools is free to download; Astro Locator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Astro Locator ships an update every 3 months, E Ink CP Tools every 5 months. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.
| Parameter | Astro Locator | E Ink CP Tools |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.8 (68 ratings) — better | — |
| Positive reviews | 77.3% of reviews | — |
| Number of ratings | 68 — better | — |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 9 MB |
| Age rating | 12+ | 4+ |
| Developer | Progress Concepts Limited | E Ink Holdings Inc. |
In-app purchases
Astro Locator
No in-app purchases
E Ink CP Tools
No in-app purchases
Questions
Is Astro Locator free?
Is E Ink CP Tools free?
Do Astro Locator or E Ink CP Tools have ads?
Which is updated more often, Astro Locator or E Ink CP Tools?
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