Machala is typically a safe city for solo female travelers. There isn't a high risk of violent crime, but petty crime such as pickpocketing and bag snatching can occur. Therefore, maintaining vigilance and awareness of your surroundings at all times is recommended. Always keep your personal belongings secure, be cautious when out at night and avoid walking alone in secluded areas or less touristic streets. Using registered taxi services or trusted ride-hailing apps can help to ensure safety during transportation. Moreover, cultural norms and attitudes in Ecuador are generally respectful towards women. However, it's important to be aware of and respect local customs and dress modestly to avoid unwanted attention.