It's not possible to install KMyMoney on Tumblweed:

zypper in kmymoney
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Problem: kmymoney-4.7.2-1.7.x86_64 requires akonadi-runtime >= 1.13.0, but this
requirement cannot be provided
  uninstallable providers: akonadi-runtime-1.13.0-7.5.i586[openSUSE-20150725-0]
                   akonadi-runtime-1.13.0-7.5.x86_64[openSUSE-20150725-0]
 Solution 1: Following actions will be done:
  deinstallation of akonadi-server-15.12.3-1.2.x86_64
  deinstallation of kdepim-runtime-15.12.3-2.2.x86_64
  deinstallation of akonadi_resources-15.12.3-2.2.x86_64
  deinstallation of korganizer5-15.12.3-2.2.x86_64
  deinstallation of kmail5-15.12.3-2.2.x86_64
  deinstallation of kdepim-15.12.3-2.2.x86_64
  deinstallation of kaddressbook5-15.12.3-2.2.x86_64
  deinstallation of libkdepim-15.12.3-2.2.x86_64
  deinstallation of akregator5-15.12.3-2.2.x86_64
  deinstallation of kleopatra5-15.12.3-2.2.x86_64
  deinstallation of knotes5-15.12.3-2.2.x86_64
  deinstallation of kontact5-15.12.3-2.2.x86_64
 Solution 2: do not install kmymoney-4.7.2-1.7.x86_64
 Solution 3: do not install kmymoney-4.7.2-1.7.x86_64
 Solution 4: break kmymoney-4.7.2-1.7.x86_64 by ignoring some of its
dependencies

Choose from above solutions by number or cancel [1/2/3/4/c] (c): 

zypper info akonadi-runtime
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Information for package akonadi-runtime:
----------------------------------------
Repository: openSUSE-20150725-0
Name: akonadi-runtime
Version: 1.13.0-7.5
Arch: x86_64
Vendor: openSUSE
Installed: No
Status: not installed
Installed Size: 3.2 MiB
Summary: PIM Storage Service
Description: 
  This package contains the data files of Akonadi, the KDE PIM storage
  service.