Help and contact

Quick answers to the most common questions. If you cannot find yours, write to us. The app interface is in Spanish for now, so on-screen labels are shown in Spanish with an English gloss.

Gemelos a la Vista · Stackoo

Write to us

[email protected]

We reply within 48 working hours. To help us help you faster, tell us:

  • your iPhone model and iOS version,
  • the app version and
  • the level you are on.

Frequently asked questions

How do I play?

Match two twin tiles that are in the same row or the same column, with nothing in between. Swipe one tile onto its twin (or tap one and then the other) and both disappear. Clear the board to win.

If there is a stone or any other tile between the two, the line is cut and that pair does not count. With four or six of a kind, choose carefully which goes first. You can switch between swiping and tapping in Ajustes → Cómo juegas (Settings → How you play), and replay the guide in Ajustes → Cómo se juega (Settings → How to play).

If you get stuck: Deshacer (Undo), Comprobar (Check: tells you if you are on track) and Pista (Hint).

How do I restore my “No Ads” purchase?
  1. Open the app and go to Ajustes (Settings).
  2. Under Tienda (Store), tap Restaurar compras (Restore purchases).
  3. Use the same Apple ID you bought with.

If it does not show up, write to us with Apple's receipt and we will look into it.

What does “No Ads” include?

It is a one-time payment of €3.99 (price in Spain, VAT included), with no subscription. It removes the ads between levels and the video offer, and gives you an extra hint on every level. It is tied to your Apple ID and does not depend on having an account with us.

I want a refund

Refunds are handled by Apple. Request one at reportaproblem.apple.com.

Will I lose my progress if I change iPhone?

Without an account, your progress lives only on the iPhone and is removed when you uninstall the app. With an account, it is saved in the cloud and follows you. To create one, go to Ajustes → Guardar mi progreso (Settings → Save my progress) (with Apple, Google or email). It is optional.

How do I delete my account and data?

In the app: Ajustes → Cuenta → Borrar cuenta (Settings → Account → Delete account). You can also ask us by email. The steps and what gets deleted are at Delete account.

League: what is my nickname and can I change it?

When you start you get a random, friendly nickname. You can change it in your league profile (3 to 20 letters or digits, no spaces, and not already taken). The first change is free and after that you can change it once every 7 days. Offensive nicknames are filtered.

Your group sees your nickname, avatar, league and points (never your email or your name). If you play without an account, you can leave the league and delete your data from your profile or from Settings. If you have an account, see how to delete your data.

I saw an offensive nickname: how do I report it?

In the standings, tap ⋯ on that player's row, or press and hold the row, and choose Denunciar (Report). A person reviews reports and, if the nickname breaks the rules, we change it to a random one. You can also choose Ocultar (Hide) so you no longer see that player on your iPhone.

If you want to give us more context, write to [email protected] with the nickname and the week.

Ads and tracking

Your first session has no ads. After that, interstitials appear only between levels and with no sound; the rewarded video only plays if you ask for it to get an extra hint. Where the law requires it, we ask for consent first, and on iOS we ask whether you allow tracking.

To change your tracking choice: iOS Settings → Privacy & Security → Tracking. If you do not allow tracking you will still see ads, but without your advertising identifier. The way to not see them is “No Ads”. More in the privacy policy.

I found a bug or have a suggestion

Write to [email protected] with your iPhone model, iOS version, the level and what you expected to happen. If you can, attach a screenshot.

Other links