100ls vs LetzFly Ground School
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
100ls
Read full descriptionHide full description
100LS helps you train English listening with real podcasts, synced subtitles, sentence replay, and bilingual translation. No flashcards. No drills. Just real audio, one sentence at a time. 100 Days Language Study Learn English through real podcasts. No flashcards, no drills. Learn English the way you actually use it. 100LS is built for learners who are past the basics and ready to train their ear on real, unscripted English. Pick a podcast episode you're curious about, hit play, and let the content do the teaching. Synchronized subtitles highlight word-for-word as audio plays. Tap any line to jump back and replay it. Toggle your native language translation on or off. Slow it down to catch every word, or speed it up to push your comprehension. Repeat until it clicks. Features Synced Subtitles Every word lands on screen exactly when it's spoken. Tap any subtitle line to jump to that moment in the audio β no scrubbing, no guessing. Native Language Translation Powered by Apple's on-device translation engine. Works offline. Toggle translations on when you need context, off when you want the challenge. Automatic Transcription No subtitles for an episode? 100LS generates them automatically using on-device speech recognition, then syncs them to the cloud so they load instantly next time. Variable Playback Speed 0.75x for close listening. 1x for natural pace. 1.25xβ2x for review. One tap to cycle through. Learning Analytics Track your daily listening time and streaks. Small numbers add up β 20 minutes a day compounds fast. Who it's for You've studied English. You can read it fine. But listening to native speakers still feels like catching every third word. 100LS is for that gap β the one between knowing the language and actually hearing it. Requirements iOS 17.0 or later. Translation requires iOS 18.0 β language models download once on first use. Privacy Policy: https://socratop.com/privacy User Terms: https://socratop.com/terms
LetzFly Ground School
Read full descriptionHide full description
Practice for your EASA PPL(A) theory exams and learn about different topics. This app allows you to learn, take mock tests, save questions, track your stats and examine your mistakes in order to prepare you for the exams. (This is not validated or endorsed by EASA or FIs and may contain inaccuracies and errors. Use it together with the official learning materials, not instead of them.)
Screenshots
Verdict
The clearest difference is update cadence: LetzFly Ground School at every 5 days against 100ls's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. 100ls sells 3 in-app purchases, starting at $4.99 per month and LetzFly Ground School sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
100ls ships an update fortnightly, LetzFly Ground School every 5 days. Both last shipped on October 31, 2026.
| Parameter | 100ls | LetzFly Ground School |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Every 5 days β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad β better |
| Requires iOS | 18.0 | 17.0 β better |
| Further details β not scored | ||
| Size | 15 MB | 188 MB |
| Age rating | 12+ | 4+ |
| Developer | Socratop Tech | NeatCapital OU |
In-app purchases
100ls
- 100ls plus monthly1 Month trial$4.991 Month
- 100ls plus yearly7 Days trial$39.991 Year
- 100ls η»θΊ«δΌε$39.99
LetzFly Ground School
- Air Law$5.99
- Aircraft General Knowledge$5.99
- Flight Performance and Planning$5.99
Show 7 moreShow fewer
- Human Performance$5.99
- Meteorology$5.99
- Navigation$5.99
- Operational Procedures$5.99
- Principles of Flight$5.99
- Communications$5.99
- Unlock All Topics$29.99
Questions
Is 100ls free?
Is LetzFly Ground School free?
Do 100ls or LetzFly Ground School have ads?
Which is updated more often, 100ls or LetzFly Ground School?
Other comparisons















