Katakana Error Search vs BTFields
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Katakana Error Search
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A brain training app that uses katakana is now available! Can you distinguish between katakana and characters that look like katakana? The elapsed time until you answer 10 questions correctly in 3 levels of beginner, intermediate and advanced will be recorded! Aim for brain training and record update while having fun! For inquiries, please use the review section or DM here. https://twitter.com/corasck
BTFields
Experience four classic war game genres in one app. Engage in tactical hex-based combat, deep WWII turn-based strategy, or sci-fi planetary and hex campaigns. Each mode offers unique objectives and gameplay mechanics.
- Hex-based tactical combat
- WWII turn-based strategy
- Sci-fi planetary warfare
- Sci-fi hex campaign
- Mission-based objectives
- Historical campaigns
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BTFields delivers four distinct battle strategy experiences: - Mission-Based Tactical Combat: Command multiple units on a hex-based map to complete diverse objectives—from defending key positions to eliminating enemy forces. Inspired by Battle Isle and based on Crimson Fields. - WWII Turn-Based Strategy: Engage in historically inspired campaigns featuring entrenchment, defensive fire, surprise encounters, supply logistics, weather effects, reinforcements, and more. Designed for tactical depth and strategic planning. Inspired by Panzer General and based on lGeneral. - Sci-Fi Planetary Warfare: Assemble your forces to secure the newly discovered planet Icarus, rich in minerals and alien artifacts. Inspired by Command & Conquer and based on Hostile Takeover. - Sci-Fi Hex Campaign: Lead your forces through a story of 19 missions on Easy, Normal, or Hard difficulty. Based on Signus.
Screenshots
Verdict
The clearest difference is ads: Katakana Error Search at none against BTFields's shown. Katakana Error Search also leads on iOS requirement (11.0 vs 15.0). On price, update cadence, 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. Neither carries in-app purchases, so what you see is what you pay.
Katakana Error Search ships an update every 6 weeks, BTFields every 2 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | Katakana Error Search | BTFields |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (3 ratings) — better |
| Positive reviews | — | 78.6% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 20 MB | 181 MB |
| Age rating | 4+ | 4+ |
| Developer | Kazuya Fujita | Jianfeng Wu |
In-app purchases
Katakana Error Search
No in-app purchases
BTFields
No in-app purchases
Questions
Is Katakana Error Search free?
Is BTFields free?
Do Katakana Error Search or BTFields have ads?
Which is updated more often, Katakana Error Search or BTFields?
Other comparisons
