HiroshimARcive vs SumXMinus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HiroshimARcive
Explore historical data of Hiroshima in augmented reality. View information overlaid on a 3D map or directly through your camera, bringing the past to life.
- Augmented Reality (AR) interface
- Pluralistic digital archive
- Map mode with markers
- AR mode with camera view tags
- Data from multiple historical sources
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"HiroshimARchive" is an AR (Augmented Reality) interface of "Hiroshima Archive" that is a pluralistic digital archive of the Hiroshima atomic bomb. In the "Map mode", the data is displayed by markers on a 3-D map. And in the "AR" mode, the data of Hiroshima in 1945 is displayed as AR tags on the camera view. "HiroshimARchive" includes the data of: - Hiroshima Peace Memorial Museum - The Hiroshima Jogakuin Gaines Association - Hiroshima Baptist Christ Church - The Hachioji Hibakusha Association - The Chugoku Shimbun - The Adachi-ku Hibakusha Association - Hiroshima Jogakuin Senior High School - NGO Ant-Hiroshima - NPO No More Hibakusha
SumXMinus
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Created by a Math Teacher Train your brain in just 30 seconds. QuickMath Series A fast and fun way to master mental math. Can you find the right number pairs? Use both positive and negative numbers to reach the target. Example: (-2) + (-4) = -6 (-4) + (+5) = 1 Challenge yourself and improve: • Negative number understanding • Mental calculation speed • Focus and thinking skills From upper elementary to middle school level. QuickMath Series • SumX – Number Pair Puzzle • SumXMinus – Negative Number Training • Common Divisor – Divisor Brain Training • Exponent – Power Calculation Challenge • Decimal Finder – Number Line Intuition
Screenshots
Verdict
The clearest difference is ads: HiroshimARcive at none against SumXMinus's shown. HiroshimARcive also leads on device support (3 vs 1) and iOS requirement (8.0 vs 16.0). On price, update cadence 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. Neither carries in-app purchases, so what you see is what you pay.
HiroshimARcive ships an update every 4 weeks, SumXMinus every 6 weeks. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.
| Parameter | HiroshimARcive | SumXMinus |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 weeks — better | Every 6 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 8 MB | 32 MB |
| Age rating | 9+ | 4+ |
| Developer | 英徳 渡邉 | Katsuhiko Yao |
In-app purchases
HiroshimARcive
No in-app purchases
SumXMinus
No in-app purchases
Questions
Is HiroshimARcive free?
Is SumXMinus free?
Do HiroshimARcive or SumXMinus have ads?
Which is updated more often, HiroshimARcive or SumXMinus?
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