Comparison

Astrolabe vs Unit Convert

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Astrolabe

Read full description

Features: - Augmented Reality: Astrolabe will detect the sky for you and will blend the sun path with it. You can easily control blending amount by scrolling up/down with two fingers. You can take a picture as you walk by a location that would be ideal for your photo shoot. Check the image in your recent plans to see whether the composition you had in your mind, will be attainable. - Simulated Camera and lens: Astrolabe simulates and works like a DSLR camera and lens. You can change the sensor size in the settings, and the focal length that will appear on the screen will be the one you need to capture your photo. You can double tap with two fingers to see the whole picture frame. This will help you to compose a better image. - iCloud sync: With the help of iCloud sync, your plans will sync across all of your devices. - Reminder: After you've achieved your desired result, you can set a reminder to ensure you don't miss the shoot. Optional features: - Pro: You don't need to be at the spot where you want to capture your photo, if you use Google Street inside Astrolabe (see the In-App purchases section on the settings inside Astrolabe for the price available in your country). Simply select the location with the help of street view overlay on map. The street view images you will see on main view are simulated using the same DSLR settings you used for Augmented Reality. This is just the beginning for us and we have so many features planned for Astrolabe (including planning for the moon, Milky Way and star trails). Please guide and support us in improving our work. We intend to offer an accurate Astrolabe to your pockets so you can plan your shots with ease. Astrolabe includes Google Maps features and content for iOS. Street View are only available in certain geographical regions. Astrolabe is not related to, or affiliated with Google Inc. Google Maps™, Google Places™, PEGMAN™ and Google Street View™ are trademarks of Google Inc. Terms of use: https://www.dariusm/terms

About

Unit Convert

This utility app offers seamless unit conversions without ads or accounts. It supports offline use, custom units, and precise fractional inch conversions, making it a powerful tool for everyday and professional needs.

Highlights
  • Ad-free and account-free operation
  • 100% offline functionality
  • Custom unit creation
  • Fractional inch conversion with selectable precision
  • Feet-inches to metric conversion
  • Integrated calculator for fractions
  • Live exchange rates (cached offline)
Features
Read full description

No categories to browse. No ads to dismiss. Just start typing—it’s as simple as this. Built to stay. Out of your way. -No Interruptions. Zero ads, zero banners—focus entirely on the task at hand. -No Accounts. Open the app and start converting. We don't track you, and we don't require a login. -Unplugged. Every conversion engine is built to work 100% offline. From remote job sites to the heart of the kitchen, your tools are always ready. -Make the app your own by adding custom units. Choose your preferred output—decimal, scientific, or fractional—and save your most frequent conversions as Favorites for one-tap access. Precision you need, at lightning speed. -Convert to fractional inches with selectable precision—down to 1/16", 1/32", or beyond. Include conversion to fractional inches with ability to select accuracy (1/8, 1/16 etc). For example 35.235 cm -> 13 7/8" or 13 28/32" depending on the level of precision chosen. -Includes conversion from "feet inches" and to "feet-inches". For example convert 6' 4" -> 193.040 cm. Convert 282.43 cm -> 9' 3 1/4". -Includes conversion from "pound ounces". For example convert 2 lb 18 oz -> 2.325 kg. -Effortlessly bridge the gap between "Feet-Inches" and metric. Move from 6' 4" to centimeters and back again with surgical accuracy. -Perform basic math and input fractions directly into the conversion field. It’s a calculator and a converter, perfectly in sync. Infinite range, for every exchange. -Always Current. Access live exchange rates that stay cached for offline use when you’re off the grid. -Depth and Breadth. Whether it’s running pace, shoe sizes, or mass-to-volume for the perfect bake, we’ve covered the essentials and the obscure. -Industrial Strength. Professional-grade support for flow rate, torque, force, viscosity, and density.

Screenshots

Astrolabe4 screens
Unit Convert4 screens

Verdict

The call

The clearest difference is update cadence: Unit Convert at every 3 months against Astrolabe's every 46 months. Unit Convert also leads on device support (4 vs 2) and iOS requirement (15.6 vs 17.6). On price, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Astrolabe sells 2 in-app purchases, starting at $4.49 per month and Unit Convert sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Astrolabe ships an update every 46 months, Unit Convert every 3 months. Both last shipped on October 27, 2026.

Scorecard3 real differences · 7 level
Astrolabe versus Unit Convert: the parameters behind the verdict, then further details
ParameterAstrolabeUnit Convert
PriceFreeFree
Rating—4.6 (15 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—15 — better
Update frequencyEvery 46 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS17.615.6 — better
Further details — not scored
Size68 MB3 MB
Age rating4+4+
DeveloperDariush MajidiRiver Right Ltd

In-app purchases

2 purchases

Astrolabe

Subscriptions2
  • Pro3 Days trial$4.491 Month
  • Pro7 Days trial$48.991 Year
1 purchases

Unit Convert

One-time1
  • Exchange Rates$0.99

Questions

Is Astrolabe free?
Astrolabe is free to download, with in-app purchases available.
Is Unit Convert free?
Unit Convert is free to download, with in-app purchases available.
Do Astrolabe or Unit Convert have ads?
Neither Astrolabe nor Unit Convert shows ads.
Which is updated more often, Astrolabe or Unit Convert?
Astrolabe ships an update every 46 months, and Unit Convert every 3 months. Most recently, Astrolabe was updated on October 27, 2026 and Unit Convert on October 27, 2026.

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