Bulb vs Once Upon A
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bulb
Read full descriptionHide full description
Learn languages by reading real books and browsing websites. Tap any word for instant translation, build vocabulary from what you read, and improve your writing with AI feedback. Bulb is for people who want to learn through authentic content instead of gamified drills. Import EPUB books, browse foreign-language websites with built-in translation, and use AI feedback to improve your writing. === HOW IT WORKS === READ REAL BOOKS Import EPUB books in your target language. Tap any word for instant translation and pronunciation. Save words to your vocabulary as you read. Double-tap sentences for full context. Create bookmarks and highlights. BROWSE AND TRANSLATE WEBSITES Read news, articles, and blogs in your target language with built-in translation. Tap unfamiliar words for definitions. Save vocabulary while browsing. Practice with real-world content that interests you. BUILD VOCABULARY IN CONTEXT Every word you look up is saved with its original sentence. Review with spaced repetition flashcards generated from your reading. Practice translating sentences back and forth. Learn words as they are actually used. GET AI WRITING FEEDBACK Write essays, emails, or journal entries and receive detailed analysis of grammar, style, and vocabulary. See specific error patterns with visual charts. Get suggestions tailored to your level. Track your improvement over time. === WHO IT IS FOR === - Professionals improving business English or foreign-language writing for work - Students preparing for language exams with real reading and writing practice - Book lovers who want to read novels and nonfiction in other languages - Learners who prefer authentic content over artificial lessons and gamified drills === SUPPORTED LANGUAGES === English, Spanish, French, German, Chinese, Japanese, Italian, Portuguese, Russian, Korean, Arabic, Serbian === KEY FEATURES === - EPUB reader with tap-to-translate - Built-in web browser with instant translation - Automatic vocabulary capture with context - Spaced repetition flashcards - AI essay analysis with grammar, style, and vocabulary feedback - Writing progress tracking with visual charts - iCloud sync across all your iOS devices Built for focused reading, vocabulary, and writing practice without gamified drills. Requires internet connection for AI features and translation. Privacy Policy: https://thebulb.app/privacy Terms of Service: https://thebulb.app/terms
Once Upon A
This educational app helps users learn Mandarin Chinese vocabulary using narration and images. It supports both PinYin and BoPoMoFo learning methods. The app is designed to reinforce word recognition and pronunciation.
- Mandarin vocabulary learning
- PinYin support
- BoPoMoFo support
- Narration for pronunciation
- Image-based learning
- Reinforces vocabulary
Read full descriptionHide full description
Learn Mandarin Vocabulary in PinYin and BoPoMoFo! Once Upon A is the first and only app on designed to reinforce Mandarin Chinese vocabulary with narration and images. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is iOS requirement: Once Upon A at 15.1 against Bulb's 17.0. On price, update cadence, ads and in-app purchases 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. Bulb sells 3 in-app purchases, starting at $2.99 per 7 days and Once Upon A sells 14 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.
Bulb ships an update every 5 days, Once Upon A every 3 days. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.
| Parameter | Bulb | Once Upon A |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 5 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 40 MB | 71 MB |
| Age rating | 17+ | 4+ |
| Developer | Danis Gaiazov | SassyTags |
In-app purchases
Bulb
- Premium Weekly$2.997 Days
- Premium Monthly7 Days trial$6.991 Month
- Premium Annual7 Days trial$49.991 Year
Once Upon A
- Monthly Subscription$19.991 Month
- Small$4.99
- 3 Story Pack$9.99
- Medium$9.99
Show 10 moreShow fewer
- 10 Story Credits$10.00
- 5 Story Pack$14.99
- 20 Story Credits$16.00
- 7 Story Pack$19.99
- Large$19.99
- 25 Story Credits$20.00
- X Large$29.99
- 50 Story Credits$35.00
- 75 Story Credits$50.00
- 100 Story Credits$60.00









