These sorts of adjustments are not uncommon. The changes in pricing are expected to take place across these countries in the next 72 hours, according to an email sent to developers by Apple:

When foreign exchange rates change, we sometimes need to update prices on the App Store. Within the next 72 hours, prices for apps and In-App Purchases will increase in the following territories:

Canada Israel Mexico New Zealand Russia Singapore South Africa

Subscriptions will not be interrupted in Canada, New Zealand, Mexico, and Singapore. Shortly before their existing subscription renews, subscribers in these territories will receive an email from us to let them know about the price increase with the option to turn off their subscription. Subscribers in Russia and South Africa will need to resubscribe at the new price. Israel will not be impacted, as auto-renewable In-App Purchase subscriptions are not supported there.

Two new low-price tiers will be available for the Canadian and New Zealand App Store: Alternate Tier A and Alternate Tier B. We'll automatically update the prices for existing apps and In-App Purchases that already use the Alternate Tier A and Alternate Tier B price tiers.

Proceeds for the Romanian App Store have increased to account for the VAT (Value Added Tax) decrease from 24% to 20% effective Jan 1, 2016. Retail prices on the Romanian App Store have not changed.

The Rights and Pricing section of My Apps will be updated with the new prices within 72 hours. You can also download the updated price tier chart.

If you have any questions, contact us.

Best regards, The App Store Team