If you are an EU/EEA/Swiss national, you can enter and remain in Ireland for 90 days without needing a visa. If you are a foreign national from a visa-required country, you must apply for a visa before leaving your country.
Living In Ireland Vs UK – Quality Of LifeIf you want a long life, both countries have a high life expectancy but Ireland is higher than the UK at 82.3 years instead of 81.2 years in the UK. Ireland also has a higher GNP per capita, with $79,925 compared to $42,330 in the UK.