Celpip AI vs TST Prep
Celpip AI
celpippracticeai.comTST Prep
tstprep.comSide by side
| Figure | Celpip AI | TST Prep |
|---|---|---|
| Price from | $16.99/mo | $3.08/mo |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| Plans published | 2 | 10 |
| Spec score · Language Test Prep Apps | 8.4 (#3) | 7.0 (#31) |
| Support | Support is provided by email, which the maker says is read by the person who builds the app. | The site says students can email TOEFL experts and expect a response within 24 hours. |
Plans
TST Prep
- Writing Evaluations$27, paid once
- Speaking Evaluation$29, paid once
- TOEFL Trial Lesson$29, paid once
- The Emergency Course$37 a year
- Complete Test Pack$89 a year
- The Score Builder Program$197 a year
- Reading Group Classes$247 a year
- Speaking Group Classes$247 a year
- Writing Group Classes$247 a year
- Private Lessons with a Teacher$397 a year
In their own words
Celpip AI
Celpip AI is an independent practice tool for CELPIP-General and CELPIP-General LS that simulates test format and timing. It covers Speaking, Writing, Reading and Listening, each with its own clock. After an answer, it provides an estimated score, a CLB range and four dimension scores; Writing reports also mark sentences with suggested fixes. The site says a full report arrives about five seconds after submission. The maker reports Speaking scores within one band 87% of the time at CLB 3–8 and 43% at CLB 9 and above. For Writing, it reports 95% at CLB 3–8 and provides no upper-band figure. It does not issue official scores and is not affiliated with or endorsed by the named testing and government organizations. The free plan costs nothing and includes three scored sessions for the life of the device, plus free Reading and Listening practice. A listed monthly plan costs $16.99 a month. The service is available on web, iOS and Android.