At the launch in Swindon, Cameron promised to "finish the job" of fixing the economy and sought to win over voters heading to polling stations come 7 May with a host of key pledges, saying the country was "on the brink of something special". That includes:
Extending the right-to-buy scheme to a further 1.3m families in housing association homes with discounts of up to 70 per cent. This has not been welcomed by the property sector.
2. Income tax
Increasing the threshold at which higher-rate income tax is paid to £50,000, up from the current level of £42,385.
3. Personal tax allowance
Increasing the personal tax allowance so those on minimum wage working less than 30 hours are removed from paying income tax.
4. Inheritance tax
Raising the inheritance tax threshold to £1m. That's another pledge that has been questioned. The funding will come from reducing the tax relief on pension contributions of those earning over £150,000.
5. Rail fares
Rail fares will not rise above inflation before 2020. A promise also made by Labour during the party's own manifesto launch yesterday.
6. The EU
An EU referendum by 2017.
A generous 30 hours of free childcare a week for parents of kids aged three and four years old. Good news for working parents.
An additional £8bn of funding for the NHS by 2020.
The building of 200,000 new starter homes for first-time buyers.
10. Free schools
Opening a further 500 free schools across the country.
Here's what Cameron had to say.