GanttGrind vs PMI Study Hall
An honest comparison to help you choose the right PMP prep tool.
| Feature | PMI Study Hall | GanttGrind |
|---|---|---|
| Practice Questions | ~1,500 (Plus tier) | 6,300+ |
| Price | From $39/mo (Essentials); Plus tier higher | $15 lifetime |
| Adaptive Learning | Plus tier only — basic adaptive | Full adaptive — 40% weak, 30% missed, 20% unseen |
| Source Authority | Official PMI product | Independent, ECO-aligned, third-party verified |
| Mini Exams | Included (Plus) | Custom drills + full mock exams |
| Mock Exams | 2 full mock exams (Plus) | Unlimited full mocks + custom length |
| Exam Versions | Updated to current ECO | ECO 2021 + ECO 2026 both available |
| Free Tier | No free practice | 100 PMP + all CAPM questions free |
Our Honest Take
PMI Study Hall is the official product from the people who write the exam — that authority is real and worth something. The downside: limited question volume (~1,500 vs 6,300+), monthly subscription pricing that adds up over a 3–6 month study period, and a platform that is functional but not best-in-class. GanttGrind gives you 4x more questions, real adaptive learning, and lifetime access for less than a single month of Essentials.
What We Recommend
If budget is no concern, take a Plus subscription for the official mocks plus GanttGrind for daily practice volume. If you have to choose one, GanttGrind covers more ground at a lower total cost.
Frequently Asked Questions
Is PMI Study Hall worth it?
The official mocks and the Plus tier mini-exams are well-constructed. But the subscription pricing adds up quickly — three to six months of Plus easily exceeds the cost of most third-party prep platforms outright. Many candidates use PMI Study Hall briefly for the official mocks and a third-party platform for daily question volume.
Can GanttGrind replace PMI Study Hall?
For pure practice volume and adaptive learning, yes — GanttGrind has 4x more questions and a stronger readiness model. The one thing it cannot replace is the "official PMI" badge. If you want the official mocks, pair both.
Which is closer to the real PMP exam?
PMI writes the real exam, so Study Hall questions naturally feel authoritative. GanttGrind questions are ECO-aligned and scenario-based with PMI-style distractors. Most candidates who use both say the difficulty is comparable; Study Hall feels slightly more conservative in wording.