DETPractice
7.3#4 in language test prep appsFrom $9.90 a monthFree planAndroidiOSWeb
VisitDETPractice vs TOEFLPrep.ai
TOEFLPrep.ai
6.8#11 in language test prep appsFrom $29 a monthFree planAndroidWeb
VisitWhat both publish
| Fact | DETPractice | TOEFLPrep.ai |
|---|---|---|
| AI feedback | The service provides AI-powered scoring and correction for DET speaking and writing responses. | Speaking and Writing responses receive AI grading with band-level scores and sentence-level notes; scores are practice estimates, not official ETS scores. |
| AI tutor | Its AI tutor can answer DET questions, check grammar, translate, rewrite text, and generate practice content. | Theo checks a learner’s scores and weak spots when answering questions, with 5 messages per day on Free and 50 on Premium. |
| Free access | The free tier includes all question types, 300+ practice questions, basic explanations, and limited access to some features. | Free includes one full mock test, one practice test per section, starter vocabulary sets, and 5 Theo messages per day, with no card required. |
| Support | Online customer service is listed as available Monday–Friday from 10:00 to 19:00, with email responses within one business day. | The contact page says a real person usually replies within one business day for account, billing, technical, press, integration, or partnership questions. |
DETPractice plans
- FreeFree
- Basic$9.90 a month
- Plus$19.90 a month
- Pro$39.90 a month
TOEFLPrep.ai plans
- FreeFree
- Premium$29 a month
- 3-Month Pass$59, paid once
Pick DETPractice if…
DETPractice suits people preparing for the Duolingo English Test who want practice questions, mock tests, or feedback on speaking and writing. Its web and mobile access can suit learners who want to use the same account across devices.
Pick TOEFLPrep.ai if…
TOEFLPrep.ai suits TOEFL iBT learners who want structured practice, estimated AI feedback, and a study plan based on their goals and weak spots. Speaking practice is suitable for learners with access to a microphone.