SDC vs Lingo Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SDC
Read full descriptionHide full description
This is a school-based curriculum-apps for schools at all levels SDC-DEH Features: 1.Can set the search range of nearby attractions / scene lines / scenic areas / theme stories 2.You can set the search number of nearby attractions / scene lines / scenic areas / theme story 3.Can set the search radius of nearby attractions / scene lines / scenic areas / theme stories 4. You can set nearby attractions / scene lines / scenic areas / theme stories to search for 5. Search for nearby attractions / scene lines / scenic areas / theme stories with the current location 6. Search for nearby attractions / scene lines / scenic areas / theme stories with the center of the map cross 7.Share Facebook on Attractions / Scene lines / Scenic Areas 8. Quickly switch locations with counties, cities, and towns 9. Query the regional URL of the center location
Lingo Diary
Read full descriptionHide full description
You know more than you think. If AI understands you, so will a native speaker. Stop dreading conversations. Start actually enjoying them! Lingo Diary is perfect for you — • Mind goes blank the moment you try to speak? Type or use voice messages. It feels like texting a friend, not studying. • Worried your grammar or vocabulary isn't good enough? Just say it in English. No judgment. AI gives feedback so the right phrases stick over time. • Only have small pockets of time to practice? Open the app and talk about anything. Work stress, weekend plans, whatever's on your mind. --- 【 Learn Chinese, Japanese, or Korean — Anytime, No Pressure 】 Use the vocabulary you have. Type or speak at your own pace. The more you chat, the more you'll want to. 【 Sound and Listen Like a Native 】 Get pronunciation demos for your voice messages. AI voice replies sound genuinely human. Use Listening Mode to hear before you read and train your ear to catch real, natural speech. 【 Stuck? Just Say It in English 】 Can't find the word? Type in English and keep going. No frustration, no stopping. 【 Real-Time Feedback to Say It Better 】 You write a line, AI polishes it. Pick up natural phrasing through real conversations, no extra studying needed. 【 Your Personal Lingo Diary, Generated Automatically 】 Every chat becomes a diary entry. Review anytime and see how far you've come. Lingo Diary is built by a small team in Taiwan on a mission to make language learning feel a little less like work. Questions or feedback? Find us on Instagram @lingodiary.app_tw - Terms of Use: https://lingodiary.app/zh-tw/terms Privacy Policy: https://lingodiary.app/zh-tw/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: SDC at none against Lingo Diary's 3. SDC also leads on ads (none vs shown) and device support (3 vs 1). Lingo Diary's advantage is update cadence (every 9 days vs every 2 months). On price there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Lingo Diary sells 3 in-app purchases, starting at $9.99 per month. SDC asks for nothing beyond the download.
SDC ships an update every 2 months, Lingo Diary every 9 days. The most recent releases landed on September 20, 2026 and July 11, 2026 respectively.
| Parameter | SDC | Lingo Diary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 8 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Chung-Ming Huang | SPARKLECT CO.,LTD. |
In-app purchases
SDC
No in-app purchases
Lingo Diary
- Plus$9.991 Month
- Pro3 Days trial$12.991 Month
- Max7 Days trial$19.991 Month





