Comparison

Stack Guru vs PushToCam for Telescope

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

Head to head
About

Stack Guru

This app helps users memorize and practice a specific card stack, offering customizable practice modes and scheduled reminders. It features seamless integration with Apple Watch for on-the-go practice and progress tracking.

Highlights
  • Customizable practice modes
  • Scheduled practice reminders
  • Apple Watch integration
  • Dark mode support
  • CloudKit (iCloud) data security
  • Offline practice capability
Features
Read full description

Become Mnemonica stack guru! Select how and what to practice, schedule reminders and practice directly on your wrist using Apple Watch - all with dark mode support! WHY While studying Mnemonica by Juan Tamariz, I started to look for an app to serve me as a learning tool. I wanted the app to automatically remind me to practice as well as being able to quickly practice on my Apple Watch (preferably with an complication displaying some daily progress). Unfortunately I did not find what I was looking for and decided to implement the app myself. This app became Stack Guru. CUSTOMIZE Practice parts of the stack, or the whole stack - you decide! Create your custom practice experience by combining practice modes such as Card to Number, Number to Card, What Comes After, What Comes Before or ACAAN, together with selected parts of the stack. This let you either focus on cementing the basics or perfecting your existing knowledge and master the stack. REMINDER Repetition is the mother of all learning. Stack Guru can help you both memorize and to keep the stack fresh in memory. Simply set reminders and let the app notify when to have a quick practice session. Like your own personal stack trainer. APPLE WATCH Having the tool directly on your wrist makes it super easy to take a short break and focus on the stack. Anywhere and anytime! Use the complication to get the progress of your daily goal and have a quick practice session only a tap away. SECURE AND PRIVATE Practice result data stored online is stored using Apple CloudKit (iCloud) to keep the data secure and private to you. The private database data is accessible only by you. When Stack Guru is used offline, the data is temporarily saved on the device to be synchronized and removed later, when the app is back online.

About

PushToCam for Telescope

This app simplifies telescope aiming by guiding you to celestial targets without needing your phone's camera or direct sky pointing. Simply align with a bright star, and it helps you find objects of interest.

Highlights
  • No phone camera required
  • Phone orientation independent
  • Attaches to telescope tube
  • Bright star alignment
  • Object of interest catalog
  • Location-based sky model
Features
Read full description

This is an easy app that guides your telescope to target. Distinctively, this app offers a simple and unique way. 1. The app does not need phone camera to work. 2. The phone does not need to point to the sky. The phone can be in any orientation. It saves your back and neck. 3. The phone does need to be attached to your telescope using eg. Bluetac, tieback. How it works? 1. Point your telescope to a bright star in the sky. Make sure the object is in the eyepiece view. 2. Select the same bright star in the app from a list. 3. Tap Align button. Now the app is accurate in that part of the sky (within 10 degrees) and present you a list of nearby object of interest. Who is it for? It is designed for amateur astronomer who 1. wants a quick and short observation of the sky e.g 10 minutes. 2. does not want to setup phone camera and telescope alignment. 3. does not want to bend over awkwardly to use the phone. The can be attached along the tube of the telescope. The app does not use phone camera to guide user to target. It requires a bright star alignment with telescope to accurately bring user to target. User needs to have some knowledge of the bright stars. It has catalogs for Messier objects, Caldwell objects and best NGC objects. You can use it to quickly point to planets, nebulae or galaxies by using manual alignment to a nearby bright star. The app uses your location to determine the sky model. It also aligns with your telescope so that accurate pointing is possible. Quick subsequent alignment is required for different part of the sky.  Please find video tutorials in the app to align the phone and telescope, to attach phone to telescope and usage manual. If you need contact me, write to ustransit74@gmail.com. Have fun!

Screenshots

Stack Guru4 screens
PushToCam for Telescope3 screens

Verdict

The call

The clearest difference is rating: Stack Guru at 4.8 against PushToCam for Telescope's 4.1. Stack Guru also leads on review sentiment (100% vs 67%). PushToCam for Telescope's advantage is update cadence (every 2 weeks vs monthly). On price, ratings volume, 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Stack Guru holds the better App Store score, 4.8 against 4.1. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews point the same way: 100% of Stack Guru's written reviews are positive against 67% of PushToCam for Telescope's.

UpkeepUpdate frequency

Stack Guru ships an update monthly, PushToCam for Telescope every 2 weeks. The most recent releases landed on June 4, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 7 level
Stack Guru versus PushToCam for Telescope: the parameters behind the verdict, then further details
ParameterStack GuruPushToCam for Telescope
PriceFreeFree
Rating4.8 (5 ratings) — better4.1 (9 ratings)
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings59 — better
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS13.0 — better14.0
Further details — not scored
Size4 MB3 MB
Age rating4+4+
DeveloperJonas Erikssonyong chong loh

Customer experience

Stack Guru

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

PushToCam for Telescope

All ratings9 ratings
Positive66.7%
Neutral22.2%
Negative11.1%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

In-app purchases

None

Stack Guru

No in-app purchases

None

PushToCam for Telescope

No in-app purchases

Questions

Is Stack Guru free?
Stack Guru is free to download, with no in-app purchases.
Is PushToCam for Telescope free?
PushToCam for Telescope is free to download, with no in-app purchases.
Which has better reviews, Stack Guru or PushToCam for Telescope?
Stack Guru is rated higher. Stack Guru averages 4.8 out of 5 from 5 ratings, while PushToCam for Telescope averages 4.1 from 9 ratings.
Do Stack Guru or PushToCam for Telescope have ads?
Neither Stack Guru nor PushToCam for Telescope shows ads.
Which is updated more often, Stack Guru or PushToCam for Telescope?
Stack Guru ships an update monthly, and PushToCam for Telescope every 2 weeks. Most recently, Stack Guru was updated on June 4, 2026 and PushToCam for Telescope on September 22, 2026.

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