Comparison

Sigma vs Arcus VBT

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

Head to head
About

Sigma

This app offers a clean and engaging running experience with detailed analysis and personalized AI coaching. Track your runs, visualize your progress, and collect memories of your journeys on a unique map diary.

Highlights
  • Ad-free running experience
  • Daily, weekly, and monthly analysis
  • Map diary of runs and moods
  • AI-powered personalized coaching
  • Visualized calorie consumption
  • Data migration from popular wearables
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我们是一群爱跑步的设计师,纯粹、仪式感、真正懂你 —— 这才是我们想给你的跑步体验。 【你最关心的功能】 - 清爽干净的开跑:全程无打扰,自由记录你的奔跑 - 好看有趣的记录:日/周/月的多维分析视图,记录你所有跑步轨迹的总和 - 点亮心情的地图日记:跑过的城市与心情,所有回忆都收藏在一张地图里 - 贴身指导的AI伙伴:结合北京体育大学知识库,基于你的历史数据提供专业分析与个性化建议 - 可度量的跑步数据:卡路里消耗的趣味可视化,配速对标动物世界的实力 - 历史数据一键迁移:已支持苹果、佳明、华为、小米、高驰、华米和颂拓手表 【官方账号】 官网:https://www.sigma.run 小红书:@Sigma 【隐私政策】 隐私政策:https://www.sigma.run/privacy

About

Arcus VBT

Analyze barbell training with real-time or imported video analysis. Track key velocity metrics, review reps, and monitor progress over time with detailed charts and cloud sync. Designed for strength athletes and coaches seeking to enhance their training.

Highlights
  • Live camera tracking
  • Video import analysis
  • Barbell velocity metrics
  • Rep-by-rep history
  • Progress charts
  • Cloud sync
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Precise VBT and jump analysis. All on your iPhone. Arcus VBT brings velocity-based training and jump performance analysis together. Record live or import a video to measure performance, review technique and track progress—without an additional wearable sensor. PRECISE VBT. HARDWARE-GRADE ACCURACY AND RELIABILITY. Turn your iPhone into a VBT training tool. Analyze squats, bench presses, deadlifts, snatches, clean and jerks, and more. Track barbell movement with hardware-grade accuracy and reliability to monitor training intensity, understand fatigue and guide load selection. Explore mean and peak velocity, velocity loss, power and range of motion. Review joint angles, bar paths and movement phases to understand both individual reps and overall set performance. PRECISE JUMP ANALYSIS. MEASURE EVERY TAKEOFF. With proper technique, jump height measurements differ from force plate measurements by approximately 1 cm. Choose from five modes: CMJ (countermovement jump), CMJA (countermovement jump with arm swing), SJ (squat jump), DJ (drop jump) and POGO (repeated hops). Review jump height, takeoff velocity, flight time, contact time, time to takeoff, and RSI or RSI-mod where applicable. Explore individual jump replays, consistency, historical trends, same-day arm-swing gain and EUR comparisons. Supported modes also offer estimated peak power. Available metrics depend on the movement and required input data. LIVE VOICE FEEDBACK Choose announcements for velocity, power, rep count or velocity loss. Hear your performance during training and adjust your rhythm as you go. SYNCHRONIZED MOVEMENT AND DATA REPLAY Replay metric cards, velocity curves, joint angles and bar paths in sync with your movement. Rep intervals show the time between repetitions to help you review training rhythm. Supported deadlift variations also display a lower-back contour and curve to help review changes in torso posture. BUILD YOUR LVP. PERSONALIZE YOUR LOADS. Build a load–velocity profile from multiple sets. Personal OMVT calibration supports individualized 1RM estimates. Compare sets, reps and previous sessions to make more informed training decisions. TRACK PROGRESS. SHARE YOUR TRAINING. Explore training history and progress trends. Export videos with metric overlays and training posters, and sync records across devices. Separate Coach plans support athlete and training-record management. CHOOSE YOUR PLAN Lift Pro unlocks advanced barbell features. Jump Pro offers unlimited jump analysis and its advanced features. Ultra includes both Lift Pro and Jump Pro. Monthly and annual auto-renewable subscriptions are available; Coach plans are offered separately. See the app for local pricing and plan details. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless auto-renewal is turned off at least 24 hours before the current period ends. Manage or cancel subscriptions in your Apple Account subscription settings. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms: https://api.arcusvbt.com/legal/terms Privacy: https://api.arcusvbt.com/legal/privacy

Screenshots

Sigma3 screens
Arcus VBT4 screens

Verdict

The call

The clearest difference is rating: Arcus VBT at 5.0 against Sigma's 4.4. Arcus VBT also leads on review sentiment (100% vs 87%). Sigma's advantage is in-app purchases (none vs 10) and ratings volume (54 vs 6). On price, update cadence, 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. Arcus VBT sells 10 in-app purchases, starting at $6.69 per month. Sigma asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Arcus VBT holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Sigma has 54 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 87% of Sigma's written reviews are positive against 100% of Arcus VBT's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. Both last shipped on October 24, 2026.

Scorecard6 real differences · 4 level
Sigma versus Arcus VBT: the parameters behind the verdict, then further details
ParameterSigmaArcus VBT
PriceFreeFree
Rating4.4 (54 ratings)5.0 (6 ratings) — better
Positive reviews86.8% of reviews100.0% of reviews — better
Number of ratings54 — better6
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPod — betteriPhone
Requires iOS14.0 — better17.0
Further details — not scored
Size231 MB164 MB
Age rating12+4+
DeveloperChaoshi Technology (Shanghai) Co., Ltd.夏雯 姚

Customer experience

Sigma

All ratings54 ratings
Positive85.2%
Neutral1.9%
Negative13.0%
Written reviews106 reviews
Positive86.8%
Neutral2.8%
Negative10.4%

Arcus VBT

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sigma

No in-app purchases

10 purchases

Arcus VBT

Subscriptions10
  • Jump Pro Monthly$6.691 Month
  • Lift Pro Monthly$7.991 Month
  • Ultra Monthly$10.991 Month
Show 7 more
  • Arcus Coach 10 Monthly$19.991 Month
  • Arcus Coach 20 Monthly$29.991 Month
  • Jump Pro Yearly$45.901 Year
  • Lift Pro Yearly$54.901 Year
  • Ultra Yearly$75.901 Year
  • Arcus Coach 10 Yearly$149.991 Year
  • Arcus Coach 20 Yearly$229.991 Year

Questions

Is Sigma free?
Sigma is free to download, with no in-app purchases.
Is Arcus VBT free?
Arcus VBT is free to download, with in-app purchases available.
Which has better reviews, Sigma or Arcus VBT?
Arcus VBT is rated higher. Sigma averages 4.4 out of 5 from 54 ratings, while Arcus VBT averages 5.0 from 6 ratings.
Do Sigma or Arcus VBT have ads?
Neither Sigma nor Arcus VBT shows ads.
Which is updated more often, Sigma or Arcus VBT?
Sigma ships an update weekly, and Arcus VBT weekly. Most recently, Sigma was updated on October 24, 2026 and Arcus VBT on October 24, 2026.

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