# Sleipnir Mobile - Web Browser

> The one step browser that once you try you can't let go of, made in Japan!

Canonical page: [https://chrome-stats.com/d/jp.co.fenrir.android.sleipnir](https://chrome-stats.com/d/jp.co.fenrir.android.sleipnir)

## Overview

- **ID:** `jp.co.fenrir.android.sleipnir`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Fenrir Inc.
- **Category:** COMMUNICATION
- **Downloads:** 1,040,717
- **Rating:** 4.14 / 5 (10,784 ratings)
- **Version:** 3.8.5Update1
- **Last updated:** 2025-12-24
- **First published:** 2011-07-07
- **Publisher country:** JP
- **Size:** 6.00 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=jp.co.fenrir.android.sleipnir)
- **Website:** [http://www.fenrir-inc.com/](http://www.fenrir-inc.com/)
- **Privacy policy:** [https://docs.fenrir-inc.com/ja/sleipnir-mobile/android/privacypolicy.html](https://docs.fenrir-inc.com/ja/sleipnir-mobile/android/privacypolicy.html)

## Description

Sleipnir Mobile is a Japanese-designed web browser optimized for smartphones and tablets, delivering speed, precision, and convenience. Experience millimeter-tuned gestures for effortless tab switching, refreshing, and bookmark access all in one step. The browser features lightning-fast tab operations, including opening, closing, and switching tabs swiftly to enhance your browsing efficiency.

Customize your interface with user-defined buttons and panels, enabling quick access to functions and bookmarks. Advanced functionalities such as 'Hold And Go' allow for seamless page opening sequences, while offline viewing preserves your tabs' content for instant restoration. Benefit from features like automatic unloading of old tabs to save memory, ad-blocking, various view modes, extensions for extended capabilities, and cloud syncing with Fenrir Pass across multiple platforms. Sleipnir Mobile truly redefines the mobile browsing experience with a focus on speed, precision, and personalization.

## Rankings

- #66,553 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_COARSE_LOCATION`
- `android.permission.ACCESS_FINE_LOCATION`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.ACCESS_WIFI_STATE`
- `android.permission.CAMERA`
- `android.permission.INTERNET`
- `android.permission.MODIFY_AUDIO_SETTINGS`
- `android.permission.QUERY_ALL_PACKAGES`
- `android.permission.READ_EXTERNAL_STORAGE`
- `android.permission.RECORD_AUDIO`
- `android.permission.WRITE_EXTERNAL_STORAGE`
- `com.android.launcher.permission.INSTALL_SHORTCUT`
- `jp.co.fenrir.android.sleipnir.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Sleipnir Mobile is praised for deep customization, speed, and a smooth, one-handed UI with bottom tabs. It has strong long-term usage and reliability. However, multiple reviews flag stability problems (frequent crashes) and slower performance over time. Bookmark management is a pain point (import from other browsers and sync issues). Ad-blocking is not reliable and ads persist. Localization inconsistencies—English UI with non-English content—also cause friction. Overall, it’s feature-rich and fast when it runs, but reliability and cross-browser syncing need attention.

### Pros

- Highly customizable and stable.
- Fast, precise, and smooth performance with quick tab switching.
- Bottom tabs and gestures enable easy one-handed use.
- Long-time reliability and usage (many users have used it for years).

### Cons

- Frequent crashes and overall instability.
- Performance slowdowns and lag after extended use.
- Cannot import bookmarks/history from other browsers and bookmark sync may fail.
- Ad blocking is ineffective and ads are still prominent.
- Localization issues: UI often English while other text appears in Chinese/Japanese, causing confusion.

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- [Sleipnir Mobile Test Version](https://chrome-stats.com/d/jp.co.fenrir.android.sleipnir_test) — 49,144 users, 4.50 / 5
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Source: [Chrome-Stats](https://chrome-stats.com/d/jp.co.fenrir.android.sleipnir)