Bourse

Bourse unlocks when Warehouse lvl. 1 is built. In the Bourse the player can exchange items. The items are always the same, but there is a cycle limit (which appears in the right bottom corner of each item box). There are two cycles of 12 hours per day, which begin at 05:00 and 17:00 local time. On the right side are items the player has to provide/give and on the left side there are items the player receives. The amount required (or provided) for the trade is displayed below the picture of each item. There is also an area where the player can buy Rubies with real money or watch ads to get Coffee beans, Treasure map fragments lvl. 1, Katanas or Potions of healing. The trade for Coffee beans appears after completion of the first expedition, the trade for Potion of healing appears with Dungeon lvl 1.

*Exchange of goods from all over the world.*

## Bourse

Ship
  x 2
  x 3

Bedouin
  x 3
  x 3
  x 9
  x 1

## Notes

* The "Watch ads, paid" section also unlocks when Warehouse lvl. 1 is built.
* The "Ship" section unlocks when Ship lvl. 1 is built.
* The Smuggler section unlocks when Shogun's Katana Chapter II is completed.
* The Bedouin section unlocks when Bridge lvl. 1 is built.
* The Cultist section unlocks when Dungeon lvl. 1 is built.
* The timer starts when the player clicks on the ad, not when they exit it. The timer updates after the ad has been watched, but doesn't update continuously, if the player stays in Bourse. They need to exit Bourse and re-enter it.
* After all the trades per cycle are made for a particular trade option, the trade option disappears from the Bourse until the next cycle.
* There is a Warehouse section below the Bourse section, which shows only the relevant items (bought or sold in Bourse) from the player's warehouse.
* The Grimoire and Porcini mushroom trades become only available when these items are found (see Dungeon: forest).

## Problems with ads

If ads are not loading, first check if there is internet access. If no ad is found, resetting advertising ID might help (see below). Ads mostly depend on Google AdMob and Google Play Services. There are bugs that are Google won't fix for years, like playing music in the background because of a broken ad or crashing the game. Sometimes there's just no rewarded ad to show for particular region or language or device.

Note: Having personalized ads enabled finds more ads to play, because advertisers like to target specific demographics and/or countries/languages.

Note: In version 18.0, if ads are not loading ("Ad not found" text displays), the player has to go to Settings > Other > Withdraw data protection consent > Manage Options > Allow all, to consent to targeted ads. Ads may not be shown in EEA (European Economic Area) and UK, if some particular permissions were not consented to. The GDPR (General Data Protection Regulation) has made more strict rules and it's still unknown, which permissions need to be accepted for showing ads while disallowing sending personal data to ad companies.

Tip: If the ad freezes, the player can wait for a couple of seconds until the timer hits zero and then exit the ad. This will still reward the player.

1. To reset advertising ID go to phone's Setting and tap "Google".2. Scroll down and tap "Ads".3. Tap "Reset advertising ID" and relaunch Nonograms Katana.
### Music/sound playing in the background

There is a bug, which plays music/sound in the background (even though the sound in Settings is turned off). This sound is coming from broken interstitial ads and Google can't/isn't willing to fix it for years. Here are some solutions:

* **[Temporary solution]** Remove the app from "Recent apps".
* **[Temporary solution]** Go to the title screen > Play. There should be an interstitial ad. When this ad is closed the music will stop playing.
* **[Semi-permanent solution]** Disable Wifi (disconnect from internet). Because of no internet access, the ads won't be able to load. Although there must be no sound coming from ads in the first place (see points above).
* **[Permanent solution]** Buy VIP. This removes all interstitial (and banner) ads. The optional ads in Bourse are still available, but those do not cause the bug.
* **[Trivial solution]** Reduce the sound volume to zero.