Programmable saas task manager for team work?

Question

Task Management

For teamwork, a friend asked me to advise him on a non-bulky task manager with the following features (basecamp is not suitable)
1. You need to create checklists with predefined logic and conditions. For example, I create "preparation for installation of the equipment". If installation type is 1, then check tasks abc, and so on.
2. Ideally, checklists can be filled out not only on the web, but also on android with iOS
3. Import xls / csv
4. Teamwork under your logins
Plus will be support for Russian

Answer 1

this task is suitable for using CRM systems with customized workflow ( https://www.zoho.com/crm/workflow-rules.html )
If the use of CRM is unjustified by cumbersomeness, I can offer my services to develop such a tool