[termsfeed]

As rsto mentioned you can copy the agreements from Automattic as they released their Terms of Service and Privacy Policy under the Creative Commons Sharealike license [1]. However, it's important to consider that their legal agreements are suitable for their own business needs, their own website functionality, and so on [2].

A few things to look after in the Terms of Service for a SaaS app:

1. Payment terms. A "Subscription" clause can let users know exactly how subscriptions work for your app, that billing occurs in advance on a recurring basis (monthly or yearly), that subscriptions can automatically renew unless canceled (for example).

2. User-generated content. A "Your Content" clause can outline users' retained ownership of data as content created by users in an app would most likely be proprietary content.

For the Privacy Policy you can look at:

1. Communications. A disclosure to inform users that you may contact them with promotional and transactional emails.

2. A Business Transaction or Transfer clause.

[1] https://en.wordpress.com/tos/, https://automattic.com/privacy/

[2] https://termsfeed.com/blog/no-privacy-terms-wordpress/