bigstopwatch vs LevelMaster
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
bigstopwatch
This app offers a stopwatch with both analog and digital displays. The majority of the screen acts as a large button for starting and stopping measurements, with other functions accessible via text labels.
- Analog and digital display
- Large start/stop button
- Countdown preparation
- Lap/split time recording
- Reset measurement
- View next/previous lap
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アナログ風の表示とデジタル表示を兼ね備えたストップウォッチです。 画面のほぼ全体が、計測をスタート・ストップするボタンになっています。その他の機能は、以下の文字の部分に割り当てられています。 「COUNTDOWN」カウントダウンの準備 「LAP/SPLIT」ラップ/スプリットタイムの記録 「RESET」計測のリセット 「NEXT」一つ次のラップ/スプリットタイムを表示 「BACK」一つ前のラップ/スプリットタイムを表示
LevelMaster
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LevelMaster turns your phone into a precision spirit level and angle meter, using the built-in motion sensor — no extra hardware needed. BUBBLE LEVEL • Circular bubble level for flat surfaces — lay the phone on a table, shelf or countertop • Bar bubble level for vertical surfaces — hold it against a wall, door frame or picture • Automatically switches between flat and vertical modes as you move the device ANGLE METER • Large protractor-style gauge with a live degree readout • "Set as 0°" lets you zero out any starting angle — handy for measuring a slope or a change in angle (e.g. a ramp or a roof) LEVEL ALERT • A confirming beep and a light vibration the instant the device becomes level • Turn the beep or vibration off independently in Settings CAMERA OVERLAY • See a level line through the camera while you hang a shelf, a frame or a piece of art • The line turns green the moment it's level CALIBRATION • Correct small sensor offsets against a known-level reference, per device MADE FOR EVERYONE • Light & dark themes with multiple accent colors • English and Japanese • Keep the screen on while measuring PRIVACY FIRST • Works fully offline. The camera is used only to overlay the level line — nothing is ever captured, saved, or sent anywhere. No account, no cloud, no tracking. Great for DIY projects, hanging furniture after a move, and checking a boat or dock is level while fishing. Note: readings are approximate and depend on your device's sensor. LevelMaster is intended for everyday DIY use, not for professional or regulatory measurements. Free, supported by ads.
Screenshots
Verdict
The clearest difference is update cadence: LevelMaster at every 2 weeks against bigstopwatch's every 6 months. LevelMaster also leads on iOS requirement (13.0 vs 26.2). On price, ads, 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.
bigstopwatch ships an update every 6 months, LevelMaster every 2 weeks. The most recent releases landed on August 26, 2026 and September 19, 2026 respectively.
| Parameter | bigstopwatch | LevelMaster |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (75 ratings) — better | — |
| Positive reviews | 94.6% of reviews | — |
| Number of ratings | 75 — better | — |
| Update frequency | Every 6 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 26.2 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuki Yasoshima | Yuki Okawa |
Bugs and requests
bigstopwatch
Reported bugs
2 issues- Unreliable performance when multitasking on iOS 8+
- Occasional freezing when switching between apps
Requested features
3 requests- Add a pure black background option
- Implement a countdown timer feature
- Add the ability to save and export lap times
LevelMaster
Not enough reviews yet to summarise bugs or requests.
In-app purchases
bigstopwatch
No in-app purchases
LevelMaster
No in-app purchases









