GrammarBattle vs Tenpera
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GrammarBattle
Engage in an RPG-style game to improve your English grammar. Battle enemies by answering grammar questions correctly, level up your character, and unlock new tenses. Track your progress and master various English grammar topics.
- RPG-style grammar battles
- Level up and collect rewards
- Unlock grammar tenses
- Boss fights with speed challenges
- Progress tracking
- Covers various English grammar topics
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Grammar Battle: Master English Through Epic RPG Fights Turn your grammar practice into an addictive RPG game. Grammar Battle makes learning English fun, effective, and action-packed. Gameplay Features - Battle enemies using grammar knowledge - Wrong answer? Lose HP — just like a real fight - Level up from 1 to 50 and collect rewards - Unlock grammar tenses as you progress - Four battle arenas: Training, Single Tense, Mixed Tenses, and elite Boss Battles - Daily Quest with 5x rewards, once per day - Boss fights with typing and speed challenges - Track progress, streaks, and grammar mastery Educational Content Grammar Battle covers 15 English grammar topics — all 12 tenses plus three advanced topics: - Present Simple, Present Continuous, Present Perfect, Present Perfect Continuous - Past Simple, Past Continuous, Past Perfect, Past Perfect Continuous - Future Simple, Future Continuous, Future Perfect, Future Perfect Continuous - Conditionals - Passive Voice - Modal Verbs Who is it for? - English language learners (intermediate to advanced) - Students preparing for language exams - Anyone wanting to improve their grammar in an entertaining way No account. No ads. Just you vs grammar. Download Grammar Battle and start your journey to becoming a grammar master!
Tenpera
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My Reincarnation with “Fluent English” "Tenpera" is an AI-powered RPG adventure where English becomes your ultimate skill. Stop memorizing textbook phrases you'll never use. Start speaking YOUR thoughts in English. ----- Tenpera's Revolutionary Method ----- 1: Turn the sentences YOU want to say into English 2: Apply them through immersive gameplay 3: Deepen your knowledge as you adventure The secret to language mastery? Learning what you actually want to say. Things you care about stick in your memory 10x better than random textbook examples. Tenpera combines 10+ AI features in a seamless ecosystem—from instant translation to battle systems to character interactions. This isn't "ask AI a question and get an answer." It's a complete language learning adventure you can't get anywhere else. ----- Your Learning Journey ----- 1: Capture daily thoughts → AI instantly creates English flashcards you'll actually use 2: Battle monsters & build character relationships → Practice through addictive gameplay 3: Master the details → AI pronunciation, context-aware trivia, smart chat modes, and daily skill diagnosis Plus, your "Memory Bank" stores favorite sentences, trivia, and idioms for easy review anytime. ----- Core Features Breakdown ----- ● The Forging System: Turn Thoughts into Power Got a thought? Turn it into an English card instantly. Every card becomes a weapon in your arsenal. • Normal Forging: Input Japanese → Get complete English sentence cards • Partial Forging: Specify an idiom or word → AI creates a full sentence around it • Auto Forging: AI picks from 3,000+ idioms → Generates sentences automatically • Manual Forging: Create cards by hand (free—no AI usage) ● Smart AI Enhancement Every card gets AI-generated pronunciation audio + context-aware trivia that detects and explains key idioms automatically. ● RPG Progression: Level, Tier & Mana Cards level up as you practice reading aloud and complete rearrangement quizzes. Longer sentences = higher Tier & Mana = more battle power. This naturally motivates you to tackle challenging vocabulary—not because you "should," but because it makes you stronger in-game. ● Six Specialized AI Chat Modes Unlike generic AI chatbots, Tenpera splits conversations into six purpose-built modes to keep context clean and responses sharp: • Question Mode • English Sentence Correction • Japanese ↔ English Translation (both directions) • Casual Chat in English • Casual Chat in Japanese The problem with typical AI language learning? Long conversations pollute the context, degrading quality. Plus, typing prompts every time is tedious. Tenpera's solution: Context only persists in casual chat modes. Other modes stay fresh. Plus, common prompts like "How do you say ~ in English?" are built-in shortcuts. In Question Mode, just type "futon" → tap the shortcut → get a detailed explanation instantly. ● Daily Skill Diagnosis Report Once daily, receive your personalized "Chant Skill Diagnosis Report" that catches grammar gaps and tracks progress the Trivia feature can't cover. It even flags potential errors in AI-generated cards as a quality check. ● Ecosystem Features That Keep You Hooked Tenpera isn't just flashcards—it's a living world with systems that naturally encourage daily engagement: • Offering System: Sacrifice items/cards to power up Lexie, your guardian deity, for battle bonuses • Rank System: Collect powerful cards to unlock prestigious titles • Login Bonuses: Consecutive days = premium rewards • Decay System: Unused items rot over time (use it or lose it!) • Hunger System: Skip meals/water? Your stats drop • Affinity & Time-Linked NPCs: Characters appear at different times in shops, guilds, and the Bureau of Reincarnation. Speak English to raise affinity and unlock new story events Open the gateway to a new world with "Tenpera"!
Screenshots
Verdict
The clearest difference is ads: Tenpera at none against GrammarBattle's shown. Tenpera also leads on update cadence (every 3 days vs every 6 months) and iOS requirement (18.0 vs 26.0). On price, in-app purchases and device support 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. GrammarBattle sells 2 one-off in-app purchases and Tenpera sells 8 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
GrammarBattle ships an update every 6 months, Tenpera every 3 days. The most recent releases landed on August 6, 2026 and May 17, 2026 respectively.
| Parameter | GrammarBattle | Tenpera |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 6 months | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26.0 | 18.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 291 MB |
| Age rating | 4+ | 12+ |
| Developer | Ivan Belov | GALLERYG.LLC |
In-app purchases
GrammarBattle
- Full Version$0.99
- Crystals$0.99
Tenpera
- Citizen Pass (Monthly)14 Days trial$5.991 Month
- Noble Pass (Monthly)1 Month trial$24.991 Month
- Citizen Pass (Annual)14 Days trial$59.991 Year
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- Noble Pass (Annual)1 Month trial$219.991 Year
- Maseki of the Bureau$1.99
- Maseki of the Bureau$3.99
- Maseki of Baku$7.99
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- Maseki of Baku$14.99





