Android App for Track Prices Alerts (T-Shop) (Major Version Update)

AssociatedLCastleX @ CastleOneX on 19/02/2026 - 14:01
Last edited 11/08/2026 - 16:18 by 1 other user

Hi, my wife pushed me to create this app to track and compare prices. It's called All-Track and you can find it on the Play Store (Android only).
It's super simple: just go to the product page of the item you want to track, tap the red button, and confirm. That's it!
The app will notify you if the price drops (make sure to enable automatic checks).
I hope it helps you, it's completely free.

Update 11-Aug-2026

Merged from New Grocery Prices Comparison App. Feedback Appreciated.

Hi everyone,

After a long discussion with the team, we are launching a new version of the price comparison app T-Shop (formerly All-Track).

We really appreciate your feedback.

We want to transform T-Shop into the easiest platform to compare prices of retailers around NZ.

  1. Write a natural shopping list (e.g., Butter 500g)
  2. Choose the retailer (to compare)
  3. Bring your shopping list with you to the supermarket (Aisles supported in Woolworths)

We hope you enjoy this new version completely free, and no adds.

Android:
https://play.google.com/store/apps/details?id=com.castleonex…

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CastleOneX
CastleOneX

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  • AssociatedCastleX @ CastleOneX on 19/02/2026 - 14:07

    All-Track https://play.google.com/store/apps/details?id=com.castleonex…

    • 1
  • McFarty on 19/02/2026 - 17:55

    Pns: e.g. Oat milk price $4.59, your app says $459.

    • 0
    • AssociatedCastleX @ CastleOneX on 19/02/2026 - 18:17

      That's usually because the tracker is grabbing the price from the search results page instead of the actual product page.

      The search pages sometimes show prices in cents (like "459" instead of "$4.59"), which is why you're seeing $459 for the oat milk

      Quick fix:
      Just click into the actual product page first, let it load, then hit the 🎯 button. That should grab the right price ($4.59).

      Thanks for catching that btw, really helpful to know what's tripping people up!

      • 0
  • Jizah on 20/02/2026 - 08:05

    Yesterday this just kept opening the links in my default browser, did you fix this in the update or was it my fault?

    • 0
    • AssociatedCastleX @ CastleOneX on 22/02/2026 - 19:13

      Apologies for the delay (I was on leave). Yes, I've fixed this—the app now opens the link internally. You need update from play store.

      • 0
  • Drcspy on 20/02/2026 - 08:31

    I also created a price tracking app and I have yet to put it on the playstore (theres potential legality issues with price scraping as it's against the T&C's of some sites). Anyway it's very very complex to get working correctly price scraping doesn't always work. I created a work around but that doesn't always function well either. Well done you.

    • 0
    • AssociatedCastleX @ CastleOneX on 22/02/2026 - 19:32

      That’s awesome, mate. It’s definitely a complex task. Feel free to give the app a spin and send some feedback our way (dev to dev). We’ve tested it across plenty of websites and it’s working well, everything from Tesla to eBay, and obviously the local chains like PnS and New World…

      • 0
  • NovaAlpha on 21/02/2026 - 04:47

    Thanks for sharing your app. How's the battery life drain with this app running in the background, doing periodic checks? I'm not a software dev but I do dabble here and there, and as far as I know, apps will hold wakelocks to keep themselves alive in the background. This is especially important when you deal with certain phones and their ROMs, as some are pretty aggressive at killing apps. So if you're doing push notification or periodic checks, then I imagine it'd impact the battery health slightly. I've seen apps similar to this before and never really used them because I prefer having the tracking done in a container running in the cloud, or running on my Mac Mini with M4 chip, which is super efficient and since it's plugged in all the time, battery life wouldn't matter much. Whereas on Android, presumably you'd be running on your phone and that wouldn't be ideal unless you keep your data enabled 24/7 on it.

    Also, perhaps you could add custom intervals for the periodic checks? For example, 15 mins, 30 mins, 45 mins, 60 mins are the presets and also have a custom field that allows users to define their own check intervals.

    • 0
    • AssociatedCastleX @ CastleOneX on 22/02/2026 - 19:25

      Yes, we've spent months optimizing the battery performance on Android. It drains just 1% per 24 hours of background checks. We suggest setting the automatic update to a 12 or 24-hour interval; since stores typically maintain their prices for a few days, 24 hours is a great balance.

      • 1
    • Drcspy on 21/02/2026 - 07:21

      I can't answer for CastleX's app but my app which is quite similar and has similar functionality, (runs on android), has 'auto check' intervals. Currently I have it set to check prices of various items one time per day and the battery usage is absolutely minimal - so small that it's irrelevant. The app obviously has a background function which triggers an auto price check on a time frame. So all it's doing is monitoring the system time in the background and at certain times running a price check.

      • 0
      • NovaAlpha on 21/02/2026 - 13:24

        Is your app on Play Store? I'm keen to try it out. If not on the Play Store, I can just sideload it as well if you can provide the APK.

        • 0
        • AssociatedCastleX @ CastleOneX on 22/02/2026 - 19:37

          Actually, that’s a solid shout. It’d be a great idea to add a setting so users can customize the check intervals themselves. That way, if someone prefers to run checks every 2 or 3 days, they have the option.

          • 0
    • NovaAlpha on 21/02/2026 - 13:26

      Also, does it have to rely on Play Store being enabled?

      I like to have full control on my Android device, which means I tend to disable apps that I don't need to prevent them from running in the background. It saves me the trouble of configuring app ops permissions and other things like that. I have automations to automatically launch and disable apps and Play Store is one of those apps that gets automatically disabled. Because of this, I can't use certain apps that rely on it, unless I enable Play Store. Typically, they rely on it to do license checks, but since your app is free, is this required?

      • 0
      • Drcspy on 21/02/2026 - 16:52

        Check Yr Pm's………

        • 0
      • AssociatedCastleX @ CastleOneX on 22/02/2026 - 19:22

        Yes, you’ll need to use the Play Store to download All-Track, as it’s the official and secure way to get apps (in fact, we never recommend downloading apps from any other source for security and control reasons). What you could do is enable the Play Store, download All-Track, and then disable it again, but that’s just a suggestion.

        • 0
        • NovaAlpha on 22/02/2026 - 23:41

          Hi,

          I think you misunderstood my comment. I was referring to this:
          https://imgur.com/a/xxYRF6K

          If I disable Play Store, I can't use your app properly because of the above message. My question was, why does it rely on Play Store to be enabled? Normally, it's for license checks, but your app isn't doing that because it doesn't require a license.

          • 0
          • AssociatedCastleX @ CastleOneX on 22/02/2026 - 23:55

            @NovaAlpha: Oh, I see. Yeah, even though All-Track is free, the standard for Android apps is to run a security scan when you open them, and that scan relies on Google Play Services. To use All-Track, you'll need to enable that service. It's an Android security requirement that’s out of our hands. We are considering the option of distributing a signed APK, but that’s still under evaluation

            • 0
            • NovaAlpha on 23/02/2026 - 00:33

              @CastleX: By "security scan", do you mean Play Protect? That can be disabled in the settings of Play Store, so it shouldn't be doing any scans then?

              And I have Play Store disabled 99% of the time and most of my apps (except for Textra and your app) work fine without them. I'm talking various different apps ranging from corporate enterprise level ones like Company Portal, Teams, to apps like ASB, Revolut, McDonalds, etc. I have apps that check for root (which I can hide and still run them on a rooted phone) and those don't even show that Play Store popup message. So it's rather puzzling to me why your app does that, especially when it doesn't even require user accounts or have any confidential data that should be secured.

              I get the point of having security, but it doesn't make sense when even enterprise, corporate-level apps that costs millions of dollars don't have this problem with Play Store being disabled.

              To clarify, I'm not disabling Google Play Services, I'm just disabling Play Store, which is mainly used to download apps and keeping apps up to date. I like to have full control of that process and prefer it to run when I want it to, not when it wants to. That's why I keep that disabled, among all my other apps that I don't need. I only enable them when I want them to.

              Also, previously I mentioned that I suspect it's to do with a license check. I say this because I used to use this app called DeskSMS and I paid for the Pro license. The problem is that it would show the Play Store popup message and it really annoyed me. One day, I asked the dev if he could remove the need for Play Store to be enabled and just have an offline license check or use a different method somehow. He refused of course, which is understandable. But my problem is still there, so I ended up just reverse engineered the app and removed it and made it permanently Pro without having to do the license check. I feel like it's fine, since I actually paid and own a Pro license. The app continued to work fine without issues and without Play Store being enabled.

              • 0
              • AssociatedCastleX @ CastleOneX on 23/02/2026 - 07:08

                @NovaAlpha: The popup you're seeing isn't a manual 'Play Protect' scan we’ve initiated. It’s likely being triggered by the Play Integrity API (or a legacy License Verification library) integrated into our current build. Even if the app is free, these libraries often perform a 'handshake' with the Play Store app to verify the install source and ensure the APK hasn't been tampered with. When the Store is disabled, that handshake fails, and Android throws that generic system dialog.

                You've made a fair point about enterprise apps skipping this for flexibility. As a smaller dev-team, we’ve relied on standard Google-provided libraries that, unfortunately, have this 'phone home' behavior baked in by default.
                This is exactly why we are evaluating a standalone signed APK.

                • 0
                • NovaAlpha on 23/02/2026 - 14:33

                  @CastleX: Thanks, makes sense. Perhaps the app might be better suited in Fdroid instead of Play Store?

                  • 0
  • AssociatedCastleX @ CastleOneX on 11/08/2026 - 16:04
    Merged from New Grocery Prices Comparison App. Feedback Appreciated.

    Hi everyone,

    After a long discussion with the team, we are launching a new version of the price comparison app T-Shop (formerly All-Track).

    We really appreciate your feedback.

    We want to transform T-Shop into the easiest platform to compare prices of retailers around NZ.

    1. Write a natural shopping list (e.g., Butter 500g)
    2. Choose the retailer (to compare)
    3. Bring your shopping list with you to the supermarket (Aisles supported in Woolworths)

    We hope you enjoy this new version completely free, and no adds.

    Android:
    https://play.google.com/store/apps/details?id=com.castleonex…

    • 0
    • Alan6984 on 11/08/2026 - 20:10

      Cool. Is there a web version that I couldn't find?

      If not, what are your plans in that respect?

      No chance I'm installing someone's software to do this when there are web options out there :-)

      • 0
      • AssociatedCastleX @ CastleOneX on 11/08/2026 - 20:52

        Yes, we have plans for a web version, but we are prioritizing mobile versions for now.

        Less than 8% of people in NZ use web services for grocery purchases, according to Statistics NZ.

        But yes, we are working on that.

        • 0
        • Alan6984 on 11/08/2026 - 21:27

          Yes, we have plans for a web version, but we are prioritizing mobile versions for now.

          Less than 8% of people in NZ use web services for grocery purchases, according to Statistics NZ.

          But yes, we are working on that.

          Okay - thanks.

          Not entirely sure where the joke lies in that statistic, but its 87% certain to be there.

          In the meantime, have a look at GroSave - they're doing a great job at the moment. Only worth going to a broader audience if you have something significantly better to offer.

          • 0
          • AssociatedCastleX @ CastleOneX on 11/08/2026 - 22:01

            @Alan6984: I meant that the statistics tell us our priority should be the audience that shops in physical stores rather than using the web service.
            That’s why we’re launching the mobile versions first, so people can try out our shopping-list approach, which is more natural in many ways. And yes, I know Grosave has made a good effort, just like Grocer, but they still force the user to do what the algorithm should be doing.

            • 0
            • Alan6984 on 11/08/2026 - 23:31

              @CastleX: Okay - It sounds like you are locked in to the approach you have started down - I'm just suggesting you're missing the largest potential group of users, who won't be shopping on the web, nor via an application, but rather in-store, and by requiring people to install your software it will limit your potential audience. Its not personal - its just so very nineties :-)

              I'll wait until you have it up and running on a web platform, but good luck.

              • 0
              • AssociatedCastleX @ CastleOneX on 12/08/2026 - 10:43

                @Alan6984: Oh, I see the confusion. T-Shop is being designed for people who shop physically in the store. The shopping list feature is intended to replace the physical list you would usually take to the supermarket.

                And we’re starting with a mobile version that stores your lists on your device, not on our servers, it’s a more on-device experience.

                And yes, we’re going after that 90% of people who shop in physical stores.

                • 0
  • dealhunter on 11/08/2026 - 18:16

    What does this offer on top of grosave?

    • 0
    • AssociatedCastleX @ CastleOneX on 11/08/2026 - 19:15

      Other platforms force you to search for each item one by one. With T-Shop you can write your list the natural way you would when going to the supermarket (Butter 500g, Milk 2L, coffee beans) and T-Shop finds the best balance between price/quantity.

      Btw, no paywalls for any feature, and no ads.

      • 1
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