Tennis Video Analysis on iPhone — AceSense for iOS
AI tennis shot detection on iPhone. No Apple Watch needed, EU-native pricing, published accuracy. The honest alternative to SwingVision.
If you're on iOS, you're spoilt for choice — SwingVision, OnForm, and a few smaller apps all run on iPhone. So why pick AceSense?
Three honest reasons:
- EU pricing and EU data residency. Native EUR billing. Video and reports stored in europe-west1, not shuffled across the Atlantic. GDPR-compliant by default. If you live in the EU, this matters more than it sounds.
- No Apple Watch lock-in. AceSense doesn't gate any feature behind an Apple Watch. SwingVision's flagship Pro Max line calling requires one. We don't have or need that dependency.
- Published accuracy methodology. Every other "AI tennis app" describes accuracy with adjectives. We publish numbers per release on the accuracy page.
If those three matter to you, AceSense is worth the test on your free tier. If you're already deep in the SwingVision Apple-Watch ecosystem and that's working, stay there — the comparison page is honest about that.
What works on iPhone
iPhone 13 Pro through 16 Pro
The most tested platform in our QA matrix. The main 1× camera at 1080p/60fps is excellent for tennis filming. Cinematic mode off, HDR auto, focus tap-to-lock on the court before recording. Standard iOS Camera app is sufficient.
iPhone 11, 12, SE (3rd gen) and later
Fully supported. Older iPhones do 1080p/60fps fine; the AI runs in the cloud, so phone GPU isn't a factor.
iPad
Works but not optimised. The phone form factor is what AceSense's UX assumes (one-handed, on the court). iPad is fine for reviewing reports after the fact.
Camera setup specific to iPhone
Three iPhone-specific quirks worth knowing:
Use the main 1× lens, not ultrawide. iPhones since the 11 series default to a "wider" auto-mode in some camera modes, especially on subjects close to the camera. This switches to the ultrawide lens, which has noticeable barrel distortion that confuses court keypoint detection. Lock the lens at 1× before recording.
Turn off Cinematic mode. Cinematic mode applies depth-of-field blur that softens the player and the ball. The AI prefers a flat, sharp frame.
HDR is fine, but auto-exposure can hunt. On bright outdoor courts with the sun moving, iPhone auto-exposure occasionally re-exposes mid-rally and briefly affects ball-detection contrast. Tap-and-hold the court area to lock exposure before pressing record.
For the full filming guide independent of platform, see how to film your tennis match.
Pricing on iOS
Same as Android. There's no platform-specific surcharge.
- Free — €0/month, 3 analyses
- Pro — €19/month, unlimited
- Team — €49/month, 10 seats
We don't apply Apple's "iOS tax" pricing markup. The EUR price is the same on both platforms; payment goes through the App Store on iOS and Google Play on Android, with the platform fees absorbed on our side.
Full detail on pricing.
AceSense vs SwingVision on iOS — side by side
This is the honest version, just for iOS. (For the broader comparison, see /compare/swingvision.)
| AceSense | SwingVision | |
|---|---|---|
| Shot detection | Yes (5 stroke types) | Yes (5 stroke types) |
| Ball tracking | TrackNet, published F1 | Proprietary, accuracy not published |
| Court heatmap | Yes | Yes |
| Stroke-quality scoring | Yes (per-component breakdown) | Yes (high-level) |
| Real-time line calling on Apple Watch | No | Yes (Pro Max) |
| Paddle-sport mode | No | Yes |
| EU data residency | Yes (europe-west1) | No (US-hosted) |
| EU-native pricing | Yes (€) | No (USD only) |
| Free tier | 3 analyses/mo, full report | Limited demo |
| Published accuracy methodology | Yes | No |
| Android availability | Yes | No |
| Pro pricing | €19/mo | $24.99/mo |
| Top-tier pricing | €49/mo (Team, 10 seats) | ~$400/yr (Pro Max) |
The right read: SwingVision's killer feature is real-time line calling on Apple Watch. If you have an Apple Watch and you genuinely use that feature, SwingVision wins for you. If you don't have an Apple Watch, or you don't want to pay for one, or you don't actually use real-time calls in practice, the rest of AceSense's stack is the better deal — and the published accuracy methodology is the differentiator.
The Reddit thread "SwingVision: Is it worth $400?" is the typical conversation about whether SwingVision Pro Max is worth it. AceSense's Pro tier is roughly 50% cheaper than SwingVision Pro Max on annual billing, and the gap is line-calling on Apple Watch.
When SwingVision is the right choice for you
We try to be fair on this. You should buy SwingVision (and not AceSense) if:
- You play tournament-grade matches and want real-time line-call assistance from your watch.
- You're heavily invested in the Apple ecosystem and want one app that ties phone + watch + iPad + Mac together.
- You're not in the EU and EU data residency doesn't matter to you.
For everything else — and especially for the cost-conscious amateur self-coacher — AceSense is the better fit.
Apple Watch — explicitly not required
Most things an Apple Watch adds to SwingVision (real-time stats, score keeping, line calls) AceSense handles via the post-match report. The trade-off is real-time vs reflection-after-the-fact:
- Real-time is good for officiating support during a match.
- Reflection-after-the-fact is better for self-coaching, because the report contextualises a single shot inside the whole match's pattern.
If you're using an AI tennis app to get better (not to officiate), you don't need the watch.
Privacy and EU data residency
This matters more on iOS than people think — Apple's privacy stance is strong on the device, but most "AI tennis apps" then upload your video to US-hosted infrastructure where it sits under different legal protections. AceSense:
- Stores video in
europe-west1(Belgium). - Runs analysis on RunPod's EU region.
- Stores reports in
europe-west1. - Does not move data outside the EU at any point in the pipeline.
- Does not train models on your video without explicit, revocable opt-in (off by default).
GDPR-compliant by default. Full data export and full deletion are one-tap from the dashboard. See the privacy policy for the subprocessor list.
Getting started on iPhone
- Install AceSense from the App Store.
- Film a match using the filming guide. Main lens, 1080p/60fps, landscape, fence clip at 5-10 ft.
- Open the app, tap New Session, pick the video, upload over Wi-Fi.
- Read the report in 3-7 minutes.
- Optional: share with your coach via one-tap public link.
The free tier (3 analyses/month) is enough to test on three different courts or three different match types before paying. Most beta players hit Pro on month two; some stay on Free indefinitely if they only film fortnightly.
Read next: How AceSense works · Accuracy methodology · vs SwingVision side-by-side · The SwingVision alternative · Pricing · FAQ
Frequently asked questions
- What iPhone models does AceSense support?
- iPhone 11 and later, iOS 16+. Tested extensively on iPhone 13 Pro through iPhone 16 Pro. iPad supported but the phone form factor is what we optimise for.
- Do I need an Apple Watch?
- No. AceSense runs entirely from your phone video. SwingVision Pro Max requires an Apple Watch for real-time line calling; AceSense doesn't and doesn't have that dependency.
- Should I use the main camera or ultrawide?
- Always the main 1× lens. The ultrawide on iPhone 11/12/13/14/15 introduces barrel distortion that confuses the homography step. The main lens is sharp enough at 1080p to do everything the AI needs.
- Is iOS the same product as Android?
- Same features, same pipeline, same accuracy. Both built from the same Flutter codebase. We don't have an iOS-first product with Android trailing — they ship together.