Uuu vs NextNavi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Uuu
This app simulates Japanese patrol car sirens and lights. It features pre-recorded siren sounds, the ability to record and play back custom audio, and a flashing light effect. It does not include a siren amplifier function.
- Pre-recorded siren sounds
- Custom audio recording and playback
- Flashing light effect
- Simulates patrol car sirens
- Record up to 5 channels of audio
Read full descriptionHide full description
日本のパトロールカーのサイレンアプリ「Uuu」です。 ※※※必ずお読み下さい※※※ 日本特殊車両サイレンアプリ 緊急車サイレンの姉妹アプリです。類似アプリにつき、ご購入の際は、間違えないようご注意下さい。 サイレンアンプ機能は付いておりません。よって、手動や周波数が下がっていき消音する機能は搭載しておりません。 録音したサイレンや音声を再生しているだけで、サイレンアンプの機能を再現しているものではありません。 収録音 ・ウー4秒周期自動(約1分) ・ウー4秒周期自動(約1分) ・パトカーの音声4種類(1ch-4ch) 録音機能 5chに好きな音声を録音できます。 録音した音声は、繰り返し再生できます。 警光燈機能 画面の上下が、ランダムフォーに似たパターンで点滅します。 【音声録音方法】 音声合成ボタンをタップし、右下の数字を5にします。 数字が5の時、音声CHボタンをロングタップすると録音確認メッセージが表示されるので、OKをタップすると録音を開始します。 録音のを止めるには、停止ボタンをタップします。 動作・サイレンをYoutubeで確認できます。 https://youtu.be/83OEYP9vbUU
NextNavi
This utility app provides a dedicated browser for playing web-based games. It offers customization options for your screen and ensures a consistent landscape view for a desktop-like gaming experience.
- Dedicated browser for web games
- Screen customization options
- Always landscape desktop view
- Optimized for browser gaming
Read full descriptionHide full description
A browser for browser games that allows you to customize your screen and always stay in landscape in desktop view.
Screenshots
Verdict
The clearest difference is review sentiment: NextNavi at 55% against Uuu's 0%. NextNavi also leads on update cadence (every 5 days vs every 95 months). Uuu's advantage is price ($1.99 vs $3.99). On ads, in-app purchases, monetization model 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
Uuu costs $1.99 and NextNavi $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Uuu ships an update every 95 months, NextNavi every 5 days. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.
| Parameter | Uuu | NextNavi |
|---|---|---|
| Price | $1.99 — better | $3.99 |
| Rating | — | 5.0 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 55.0% of reviews — better |
| Number of ratings | — | 5 — better |
| Update frequency | Every 95 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 24 MB | 52 MB |
| Age rating | 4+ | 17+ |
| Developer | Kaji Takatsugu | 建玮 朱 |
Customer experience
Uuu
NextNavi
In-app purchases
Uuu
No in-app purchases
NextNavi
No in-app purchases
Questions
Is Uuu free?
Is NextNavi free?
Do Uuu or NextNavi have ads?
Which is updated more often, Uuu or NextNavi?
Other comparisons
