Comparison

Launchmeter vs SmoothDrive

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Launchmeter

Measure your car's acceleration performance with precise timing and G-force logging. It uses GPS and motion sensors for accurate readings, saving all your runs and routes locally for later review. Optional pro features offer weather correction and data export.

Highlights
  • 0-60 mph acceleration timing
  • GPS and motion sensor fusion for accuracy
  • G-force and friction circle logging
  • Run and route saving
  • Weather-corrected times (Pro)
  • CSV and GPX data export (Pro)
Features
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Launchmeter turns your iPhone into a performance meter. Find a safe, open space and measure your car's 0-60 mph time with one tap. ACCELERATION TIMING & SPLITS • 3-second countdown, then timing starts automatically when you pull away • Time several runs at once — 0-30, 0-60 and 0-100 mph — and set your own targets • Every split is compared with your personal best: green when faster, red when slower GPS + MOTION-SENSOR FUSION • Speed fuses GPS with your iPhone's accelerometer and gyroscope: accurate GPS gets more weight, the sensors fill the gaps between fixes • The launch moment is detected by the accelerometer, so the start isn't delayed by GPS updates • Hand shakes and road bumps are filtered out, so readings stay steady EVERYTHING AT A GLANCE • Big three-digit speed and a segmented speed bar • Friction circle for longitudinal and lateral G, plus a live G-force trace • Grade meter — tap to zero • Local temperature, humidity and pressure from Apple Weather, plus your iPhone's barometer RUNS & ROUTES SAVED • Speed and G-force traces, splits and route are saved on your iPhone for every run • Drag across the charts to replay any moment • Routes keep recording with the screen locked LAUNCHMETER PRO (OPTIONAL, ONE-TIME PURCHASE) • Weather-corrected times: air density, density altitude and SAE J1349 correction so runs compare fairly across seasons and altitude • Export CSV data and GPX tracks • Share cards with your splits and speed trace • Multiple cars: log and compare runs per car Everything else stays free forever. PRIVACY Your runs stay on your iPhone and are never uploaded. Location is only used to measure speed, record routes and look up local weather. SAFETY Only test on closed courses or where it's safe and legal. Obey traffic laws and never use your phone while driving. Continuous GPS use during a run increases battery drain. Results depend on GPS signal and phone mounting and are for reference.

About

SmoothDrive

Features
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車に置いた「コップの水」をこぼさないように走る。 SmoothDrive は、同乗者が思わず眠ってしまうような、揺れの少ない上品な運転を目指すためのアプリです。 iPhone のセンサーで加速・ブレーキ・カーブの揺れを測り、350ml のコップに入れた 300ml の水がどれだけ揺れ、どれだけこぼれたかで運転を見える化します。 ■ コップの水で、揺れがひと目で分かる ・水面が加減速やカーブに合わせてリアルに揺れます ・縁の赤いラインは 0.3G、黄色いラインは 0.15G の目安 ・コップの代わりに、真上から見た「Gボール」表示にも切り替えられます ■ 走行ごとにスムーズ度を採点 ・揺れの変化の大きさと、急な操作の回数から 100 点満点で採点 ・急ブレーキ・急加速・急ハンドル・ギクシャクを検出し、音でお知らせ ・コップからこぼした水の量も記録します ■ 走り終わったら振り返り ・荒さを色分けしたルートを地図で確認 ・最大ブレーキ・最大加速・最大横G・最高速度・平均速度 ・カーブの評価:1つずつのカーブを「速度」「入り方(曲がりながらのブレーキ)」「ハンドルの滑らかさ」「修正の少なさ」で採点 ・気になったカーブは、その少し手前から再生できます ■ コップと地図で走行を再生 ・コップの揺れと地図の動きが連動 ・地図は 2D と 3D を切り替え可能 ・1 倍から 32 倍まで再生速度を選べます ■ 共有 ・ルート・スコア・コップを 1 枚にまとめたカード画像や、ルートが描かれていく 10 秒動画を作成 ・出発地・到着地の周りをぼかして、自宅の場所を守れます(300m/500m/1km) ・カードに載せる項目は自由に選べます ■ 運転の邪魔をしない ・ロック画面と Dynamic Island のライブアクティビティで、スコアと急な操作を表示 ・ホーム画面・ロック画面のウィジェット ・コントロールセンター、ロック画面、アクションボタンからワンタッチで記録開始 ■ 記録は iCloud に ・走行記録は iCloud Drive に保存され、同じ Apple ID の iPhone・iPad で共有できます ・機種変更や再インストールのときも記録を戻せます ・記録が開発者のサーバーに送られることはありません ■ iPhone の置き方 ・iPhone はホルダーなどで車にしっかり固定してください ・向きは自由です。走り出すと、GPS の加減速から車の前方向を自動で学習します 【ご注意】 ・運転中はアプリを操作しないでください。操作は停車中に、または同乗者の方が行ってください ・スコアや G の値は iPhone のセンサーによる目安です。車両や路面、iPhone の固定状態によって変わります ・バックグラウンドで GPS を使い続けると、バッテリーの消費が大きくなります。長時間の運転では充電しながらのご利用をおすすめします

Screenshots

Launchmeter4 screens
SmoothDrive4 screens

Verdict

The call

The clearest difference is in-app purchases: SmoothDrive at none against Launchmeter's 1. SmoothDrive also leads on update cadence (every 4 days vs every 7 months). Launchmeter's advantage is iOS requirement (17.0 vs 26.0). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Launchmeter sells 1 one-off in-app purchase. SmoothDrive asks for nothing beyond the download.

UpkeepUpdate frequency

Launchmeter ships an update every 7 months, SmoothDrive every 4 days. The most recent releases landed on October 16, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 6 level
Launchmeter versus SmoothDrive: the parameters behind the verdict, then further details
ParameterLaunchmeterSmoothDrive
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 7 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size2 MB7 MB
Age rating4+4+
Developer耀民 王Takehiro Iimure

In-app purchases

1 purchases

Launchmeter

One-time1
  • Launchmeter Pro$4.99
None

SmoothDrive

No in-app purchases

Questions

Is Launchmeter free?
Launchmeter is free to download, with in-app purchases available.
Is SmoothDrive free?
SmoothDrive is free to download, with no in-app purchases.
Do Launchmeter or SmoothDrive have ads?
Neither Launchmeter nor SmoothDrive shows ads.
Which is updated more often, Launchmeter or SmoothDrive?
Launchmeter ships an update every 7 months, and SmoothDrive every 4 days. Most recently, Launchmeter was updated on October 16, 2026 and SmoothDrive on October 26, 2026.

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