Comparison

TrailStack vs Oki

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

Head to head
About

TrailStack

Features
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Turn any video into a stunning strobe photo — right on your iPhone device. TrailStack stacks multiple frames from your video into one composite image, creating the classic strobe effect used by sports photographers, coaches, and creative artists. No cloud upload. No subscription. No Photoshop skills required. HOW IT WORKS 1. Pick any video from your camera roll 2. Adjust Trim, Interval, Sensitivity, Fade, and Cleanup sliders 3. See results instantly in the real-time preview 4. Export a crisp PNG at your video's original resolution to your Photos KEY FEATURES • Import any existing video — no in-app recording required • Real-time preview as you adjust every parameter • 4 built-in presets: Default, Sport, Art, Sharp • Supports slow-motion video for ultra-detailed motion analysis • Export at original video resolution PNG (up to 1920px on the longest side) • 100% on-device processing — your videos never leave your phone • Free to use, with an optional ad to remove the watermark from exports PERFECT FOR • Athletes & coaches — analyze a golf swing, tennis serve, or gymnastics routine • Skateboarders & BMX riders — capture trick sequences in one frame • Dancers & performers — visualize choreography and movement flow • Physics & science teachers — demonstrate motion and velocity visually • Social media creators — create eye-catching composite sports photos WHY TRAILSTACK? Other strobe photo apps require you to record video inside the app — TrailStack works with footage you already have. Sony MotionShot was discontinued in 2021. Clipstro is iOS-only and cannot import existing videos. Photoshop can achieve similar results, but takes 30–60 minutes of manual work per photo. TrailStack does it in seconds. PRIVACY FIRST All processing happens entirely on your device. We never upload, store, or transmit your photos or videos to any server. What's on your phone stays on your phone. FREE & FAIR TrailStack is free to download and use. Exports include a small watermark. Watch a short optional ad to save a watermark-free version at any time — no subscription, no hidden fees. Download TrailStack and see your movement in a whole new way.

About

Oki

Features
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動画をずっと回しっぱなしにするのは、容量がもったいない…」 「でも、シャッターチャンスは一瞬で逃したくない!」 そんな悩みを解決するのが、次世代動体検知カメラアプリ「Oki-Dori(オキドリ)」です。 【Oki-Doriが選ばれる3つの理由】 1. 高精度な動体検知:独自のアルゴリズムで、微細な動きも逃さずキャッチ。動いた時だけ録画を開始します。 2. ストレージに優しい:必要なシーンだけを保存するので、iPhoneの容量を圧迫しません。 3. 夜間モード搭載:暗い場所でも独自の明るさ補正で鮮明に記録。防犯や夜間の観察にも最適です。 【こんなシーンに最適!】 ・ペットや赤ちゃんの「決定的な瞬間」の撮影に ・ゴルフや野球のフォームチェックなど、スポーツのセルフ撮影に ・不在時の簡易的な見守り・防犯カメラとして ・星空や夜間の動物観察に 【Pro版の強力な機能】 サブスクリプションに登録すると、さらに自由度が広がります: ・広告を完全に非表示に ・録画時間を最大300秒まで大幅に延長 ・0.1秒単位の超高速連写が可能に ・最高感度モードの解放で、さらに精密な検知が可能 今すぐダウンロードして、あなただけの「決定的な瞬間」を確実に手に入れましょう! 利用規約 (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ プライバシーポリシー: https://sites.google.com/eagle-eye.co.jp/oki-dori1/%E3%83%9B%E3%83%BC%E3%83%A0

Screenshots

TrailStack4 screens
Oki3 screens

Verdict

The call

The clearest difference is in-app purchases: TrailStack at none against Oki's 1. TrailStack also leads on update cadence (daily vs every 4 days) and iOS requirement (13.0 vs 18.5). 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. Oki sells 1 in-app purchase, starting at $0.99 per month. TrailStack asks for nothing beyond the download.

UpkeepUpdate frequency

TrailStack ships an update daily, Oki every 4 days. The most recent releases landed on September 8, 2026 and September 6, 2026 respectively.

Scorecard3 real differences · 3 level
TrailStack versus Oki: the parameters behind the verdict, then further details
ParameterTrailStackOki
PriceFreeFree
Update frequencyDaily — betterEvery 4 days
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.5
Further details — not scored
Size35 MB11 MB
Age rating4+4+
DeveloperHitoshi Tamurakeiryu matsumoto

In-app purchases

None

TrailStack

No in-app purchases

1 purchases

Oki

Subscriptions1
  • Oki-Dori Pro 月額プラン$0.991 Month

Questions

Is TrailStack free?
TrailStack is free to download, with no in-app purchases.
Is Oki free?
Oki is free to download, with in-app purchases available.
Do TrailStack or Oki have ads?
Both TrailStack and Oki show ads.
Which is updated more often, TrailStack or Oki?
TrailStack ships an update daily, and Oki every 4 days. Most recently, TrailStack was updated on September 8, 2026 and Oki on September 6, 2026.

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