Lens Simulator vs Voice TD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lens Simulator
Instantly visualize any focal length on your camera in real-time through your phone's viewfinder. This app accurately simulates the field of view for over 50 camera bodies and various sensor formats, aiding in lens selection and location scouting.
- Live viewfinder with accurate field of view simulation
- Supports over 50 camera bodies and major sensor formats
- Offline functionality
- Photo capture with metadata watermark
- Side-by-side focal length comparison
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Wondering what 85mm looks like on your Canon R7? Or how wide 24mm feels on a Fujifilm X-T5? Point your phone and see — instantly. Prospekt simulates any focal length on any camera body, live. HOW IT WORKS Choose a focal length from 15mm to 300mm, pick your camera body, and see exactly what that lens sees — in real time, through your iPhone. The field of view is 100% mathematically accurate. Focal lengths below 26mm need an iPhone with an ultra-wide camera; on single-camera models such as iPhone Air and iPhone 16e, the range starts at 26mm. Your iPhone automatically switches between the cameras it has — ultra-wide, wide, and telephoto — to give you the best image quality at every focal length. No guesswork. No approximations. 50+ CAMERA BODIES Canon: R5 II, R6 III, R7, R10, R50, EOS R, 5D IV Sony: A1, A9 III, A7R V, A7 IV, A6700, ZV-E10 II Nikon: Z9, Z8, Z6 III, Zf, Z50 II Fujifilm: GFX 100 II, X-T5, X-H2S, X-S20 Panasonic: S5 IIX, GH7, G9 II OM System: OM-1 II, OM-5 Leica: M11, SL3, Q3 Hasselblad: X2D, 907X Pentax: K-1 III, K-3 III Sigma: fp L Every major sensor format: Full Frame, APS-C (1.5x & 1.6x), Micro Four Thirds, and Medium Format. WHO IT'S FOR • Choosing between a 35mm and an 85mm? See the difference live • New to photography? Learn what focal lengths actually look like • Scouting a location? Preview your exact framing on the spot • Switching systems? See how crop factor changes your lenses FEATURES • Live viewfinder — 100% accurate field of view simulation • Scroll wheel with haptic snap at popular focal lengths • Full-frame equivalent display — always know your effective focal • 4 aspect ratios: 3:2, 4:3, 16:9, 1:1 • Photo capture with metadata watermark (focal length, crop factor, FF equivalent, aspect ratio) • Offline — no internet required • Landscape-optimized for maximum viewfinder size SAVE & COMPARE Capture snapshots with a built-in watermark showing your settings. Save to your photo library and compare focal lengths side by side. One purchase. No subscriptions. No ads.
Voice TD
Control Blackmagic ATEM switchers using your voice or touch. This app allows for instant command execution, macro activation, and real-time device monitoring. It operates entirely on-device for privacy and security.
- Voice command control
- Touch panel interface
- Programmable macro buttons
- Live device monitoring
- On-device speech recognition
- Timestamped command logging
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Voice TD turns your iPhone or iPad into a voice-driven control surface for Blackmagic ATEM switchers. Call directions over comms—preview, program, cut, auto—and the switcher takes them instantly. Or tap the keys. Or both. Four programmable macro buttons run any macro you've recorded in ATEM Software Control. A live device monitor watches your entire rack and alerts you the moment anything stops answering. Speech recognition runs on-device with a vocabulary locked to production commands, so ordinary conversation won't trigger a cut. Every command logs with a timestamp. Mute the mic and you have an ordinary touch panel. Supports: ATEM Mini · Mini Pro · Mini Extreme · Television Studio · TV Studio HD8 · 4 M/E Broadcast 4K No account. No cloud. No analytics. Network access only to your switcher and rack on your local network. Terms of Use https://node78.com/voicetd/terms/ Privacy Policy https://node78.com/voicetd/privacy/
Screenshots
Verdict
The clearest difference is price: Voice TD at Free against Lens Simulator's $3.99. Lens Simulator's advantage is iOS requirement (17.0 vs 26.5). On rating, ratings volume, ads and in-app purchases 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
Voice TD is free to download; Lens Simulator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Lens Simulator against 5.0 for Voice TD. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
| Parameter | Lens Simulator | Voice TD |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 10 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Vitalii Kikot | Node78 LLC |
In-app purchases
Lens Simulator
No in-app purchases
Voice TD
No in-app purchases









