DevInterviewMaster vs SheetTutor: Which Is Better in 2026?

DevInterviewMaster helps developers get interview-ready with an AI tutor that talks with you in English, Hindi or Hinglish. Work through 8,568 questions, 381 coding problems in an in-browser Monaco editor, 248 HLD and 70 LLD topics, and SQL practice on live schemas. There are also 57 real production incidents (Database, Backend, Frontend, Infra, Distributed), plus DevOps and AI Engineer Zero-to-Hero courses. Start free. Pro is ₹400/month or ₹2,299/year, with no auto-renewal. Built in India.

What problem it solves

Developers waste time on scattered interview prep. DevInterviewMaster gives one AI tutor, in English or Hinglish, covering coding, system design, SQL, DevOps and real production incidents.

SheetTutor is a free Excel learning website built around small tasks that you complete in an editable browser worksheet. You can begin without creating an account, subscribing, or installing Microsoft Excel. The exercises give you a concrete question, source data, formula inputs and a result to check.

The learning examples use original datasets. Topics include SUMIFS and COUNTIFS with multiple conditions, exact lookups, text joining, weighted averages, and absolute or mixed cell references. You can inspect worked results, edit the provided worksheet, and download a matching workbook. The reference examples and the primary practice question are labelled separately, so viewing an answer does not itself count as completing the exercise.

For example, the COUNTIFS lesson asks you to count tickets that match a team, a status, and an age limit on the same row. Its primary question uses AND logic. Additional worked references compare disjoint OR, overlapping alternatives, and numeric intervals. One overlap example shows why adding two groups can count some rows twice, then subtracts their intersection to count each eligible source row once.

The COUNTIFS practice checks a reusable formula on the current worksheet and two additional original datasets. A constant result that only matches the displayed example does not demonstrate the task. Verification applies to the supplied data and stated input rules. The feedback distinguishes an incomplete attempt from a formula that gives an incorrect result on another dataset.

Calculations run in the browser, and analytics is optional. Downloads retain the example inputs and formulas so learners can inspect them outside the site. Browser verification, reference examples, full task assessment, and independent Microsoft Excel or Google Sheets compatibility are different claims. Native-client recalculation is recorded separately from browser checks and file downloads.

SheetTutor is maintained as an English learning resource. It is free to start practising and requires no signup. Submitted by the product maintainer.