Horizontal Accelerometer vs G
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Horizontal Accelerometer
This tool measures real-time horizontal acceleration, deceleration, and lateral G-force for automobiles. It features color-coded zones and sounds for easy understanding while driving and can also be used for engineering education and evaluating structural rigidity.
- Real-time horizontal acceleration measurement
- Measures deceleration and lateral G-force
- Color zones and sound alerts for values
- Calibration for accurate readings
- Peak hold and max value tracking
- Adjustable color zone thresholds and sound
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"Horizontal Accelerometer" is a tool that displays horizontal acceleration in real time. (Application) - Measures acceleration, deceleration, and lateral G of automobiles. The acceleration value in the direction felt by the driver is displayed. Color zones and sounds make acceleration values easy to understand even while driving. - Rigidity evaluation of table legs - The horizontal accelerometer allows engineering students to actually measure and feel the acceleration value, which is useful for understanding the equation of motion. (How to use) 1. Fix the iPhone on the object to be measured. No need to fix it horizontally. When measuring the acceleration of a car, fix the iPhone on the dashboard at an angle that makes it easy to see the screen and so as not to shake. When evaluating the rigidity of the table legs, place the iPhone on the table surface, and if the iPhone slips when the table is shaken, fix it with tape. 2. Tap the "Calibration" button, then tap the "Calibrate" button. The display of the horizontal acceleration value starts. In the case of a car, please stop the car on a horizontal road and then calibrate. (Screen display) - The number at the top of the screen is the value of real-time horizontal acceleration. - "Peak hold" is the peak value of horizontal acceleration. Reset after the set time. - ”Max" is the maximum value of horizontal acceleration. Reset with the “Reset Max" button. - Acceleration values can change to red and yellow depending on the threshold. (Calibration dialog) Tap the "Calibration" button to bring up the calibration dialog. - "Calibrate": Executes calibration in the current fixed state. - ”Recall Calibration": Recall the saved calibration. - "Save Calibration": Save the current calibration. - "List of useful apps": Displays a list of useful apps. (Setting dialog) Tap the "Setting" button to bring up the setting dialog. - "List of useful apps": Displays a list of useful apps. - “Setting": A setting window appears. (Setting window) - "Color zone(value(G) or more)": Color zone thresholds, color on/off, and sound on/off can be set. The default thresholds are Red 0.40 and Yellow 0.30. - "Peak hold time(s)": Peak hold time can be set. Default is 10. - "Harshness cut filter": Harshness cut filter on/off can be set. "Harshness" means impact vibration. - "Desensitization(%)": Desensitization rate can be set. Default is 0. (Remarks) - This app works on iPhone and iPad. - Tilting the device tilts the calibrated horizontal plane, so measurement error occurs. - The developer assumes no responsibility for any loss or claims by third parties which may arise from the use of this app.
G
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「G-Trace」は、日常の作業中における転倒や衝突リスクのほか、周囲の騒音・明るさなどの職場環境を継続的にモニタリングし、記録・評価するための「総合セーフティロガーアプリ」です。 iPhoneをポケットに入れたり、机の上に置いておくだけで、各種センサーがあなたの労働環境を自動で数値化し、安全と健康を守るための目安を提供します。 【主な機能】 ■ 転倒・衝突リスク検知(加速度センサー) 激しい加速度(G)を検知すると、画面表示と強力なバイブレーションで警告します。いつ、どれくらいの衝撃があったかを自動でカレンダーとタイムラインに記録するため、日々の安全管理やヒヤリハットの記録・振り返りに役立ちます。 ■ 職場環境の騒音モニタリング(音量・デシベル測定) 周囲の音量(dB)をリアルタイムで測定し、「静か」「適切」「ややうるさい」などのステータスを表示します。パネルをタップすると、厚生労働省の「快適職場指針」に基づく50dB以下の推奨ラインや、情報漏洩を防ぐ「マスキング効果」についての詳細なガイドラインを確認できます。 ■ 職場環境の照度モニタリング(明るさ・ルクス測定) 現在の机上面などの明るさ(lx)を自動で測定し、JIS規格に基づく推奨ルクス(事務室なら500〜750lx等)を満たしているかを評価します。パネルをタップすることで詳細な照度基準を確認でき、眼の疲労を防ぐための適切な照明環境づくりをサポートします。 ■ 振り返りやすいカレンダー&タイムライン 過去に検知された衝撃データは、月別・日別のカレンダーでひと目で確認可能です。画面下部のタイムラインでは、発生時刻と最大Gをリスト形式で詳細に振り返ることができます。 【プライバシーとバッテリーへの配慮】 ・プライバシー保護の徹底:マイクやカメラの機能は、純粋に「音のエネルギー」と「光の強さ」の数値を計算するためだけに使用されます。音声の録音や通話の傍受、映像の録画・保存・外部サーバーへの送信は一切行われません。安心して常時起動させておくことができます。 ・パフォーマンスの最適化:バッテリー消費を最小限に抑えるため、バックグラウンドでの演算処理やフレームレートを極限まで最適化しています。長時間の作業でもiPhoneのバッテリー負担を軽減します。 G-Traceを利用して、より安全で、より快適なワークスペースを実現しましょう。
Screenshots
Verdict
The clearest difference is ads: G at none against Horizontal Accelerometer's shown. Horizontal Accelerometer's advantage is iOS requirement (13.0 vs 26.2). On price, update cadence, 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.
Horizontal Accelerometer ships an update every 6 weeks, G every 3 weeks. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.
| Parameter | Horizontal Accelerometer | G |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 6 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Takao Ichimura | MASAKAZU KUROKI |
In-app purchases
Horizontal Accelerometer
No in-app purchases
G
No in-app purchases









