# マンホールカードコレクション vs DamApp

The clearest difference is review sentiment: DamApp at 86% against マンホールカードコレクション's 50%. マンホールカードコレクション's advantage is update cadence (weekly vs every 2 months) and iOS requirement (9.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

マンホールカードコレクション ships an update weekly, DamApp every 2 months. The most recent releases landed on September 8, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | マンホールカードコレクション | DamApp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | **85.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | — | Free |
| Size | 35 MB | 228 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Shintaro Takemura](https://appshunter.io/developer/1072112869) | [Yuta Kokubo](https://appshunter.io/developer/1549449778) |

## What reviewers say

### マンホールカードコレクション

[App page](https://appshunter.io/ios/app/id1163614845)

**Features:** macOS Compatibility

**In-app purchases:** none


### DamApp

[App page](https://appshunter.io/ios/app/damapp/id1549449776)

Discover over 2,000 dams across Japan. Search by name, distance, prefecture, type, or purpose. Record check-ins, dam card ownership, and add favorites or notes. All dam information is available offline.

**Highlights:** Search over 2,000 dams nationwide, Filter by distance, prefecture, type, purpose, Offline access to dam details, Record check-ins and dam card ownership, Map view with MAPCODE support, Import visit records from text files

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is マンホールカードコレクション free?

マンホールカードコレクション is free to download, with no in-app purchases.

### Is DamApp free?

DamApp is free to download, with no in-app purchases.

### Do マンホールカードコレクション or DamApp have ads?

Neither マンホールカードコレクション nor DamApp shows ads.

### Which is updated more often, マンホールカードコレクション or DamApp?

マンホールカードコレクション ships an update weekly, and DamApp every 2 months. Most recently, マンホールカードコレクション was updated on September 8, 2026 and DamApp on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*