iRis vs Volt
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iRis
This app enhances vision by adding contrast to images, making text easier to read. It works with any VR headset that supports camera input and is compatible with iOS devices.
- VR headset compatibility
- Image contrast enhancement
- Grayscale vision mode
- Improved text readability
- iOS 8 and up support
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iRis current features: - Any VR Headset that allows your camera to be used works - Adds contrast to the image to make distinctions between objects easier (currently in grayscale) - Makes text easier to read - Any cell phone works (iOS 8 and up) Instructions: 1. Open iRis and place your cell phone into a VR headset. 2. Put on the VR headset Created by Henry Warren
Volt
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Volt turns your iPhone (and Apple Watch) into a smart control panel for your Bluetooth treadmill. Connect once, then control speed and incline, watch your live stats, and let Volt automatically adjust your pace for you — all while every workout is saved straight to Apple Health. Works with any treadmill that supports the Bluetooth FTMS (Fitness Machine Service) standard. LIVE TREADMILL CONTROL - Start, pause, resume, and stop your treadmill directly from your phone - Adjust speed and incline in real time, no need to touch the console - See live speed, distance, incline, elapsed time, and calories at a glance - Safety-first pairing: nearby treadmills are ranked by signal strength, and Volt warns you if a machine looks like it's already in use before you connect SMART WORKOUT MODES - Free Run — full manual control, your pace, your rules - Heart Rate Cruise Control — set a target heart rate and Volt automatically raises or lowers treadmill speed to keep you in your zone - HIIT Intervals — automated sprint/walk intervals with treadmill speed changes handled for you, so you can focus on the effort APPLE WATCH COMPANION - Mirrors your live speed, distance, incline, and heart rate to your wrist - Start and stop workouts from either device — they stay in sync - Optional haptic feedback for pace changes and interval transitions - Built for Always-On Display, so your stats stay sharp and readable without draining your battery APPLE HEALTH INTEGRATION - Every completed workout is saved to Health automatically — duration, distance, calories, and heart rate - Works whether or not you're wearing your Apple Watch: Volt saves the workout from your phone if your watch isn't paired for the session - Detailed per-second telemetry means your workout history shows real speed and heart-rate charts, not just a summary DYNAMIC ISLAND & LIVE ACTIVITY - Track your run from your iPhone's Lock Screen or the Dynamic Island without opening the app - Live speed, distance, and elapsed time, updated as you move WORKOUT HISTORY - Every past workout in one place, with distance, duration, calories, and average pace - Tap into any workout for a full speed, incline, and heart-rate breakdown over time MADE FOR RUNNERS AND WALKERS - Personalize calorie estimates with your own body weight - Available in English and Hungarian - A clean, distraction-free dashboard designed to be read at a glance, whether you're sprinting or walking the dog on your $200 basement treadmill Volt doesn't try to be a full fitness platform — it does one thing well: make your Bluetooth treadmill smarter, safer to control, and fully connected to the Health app you already use.
Screenshots
Verdict
The clearest difference is in-app purchases: iRis at none against Volt's 1. iRis also leads on iOS requirement (8.0 vs 18.0). 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
Both are free to download. Volt sells 1 in-app purchase, starting at $6.99 per year. iRis asks for nothing beyond the download.
| Parameter | iRis | Volt |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (10 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | — | Every 10 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 8.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 43 MB | 9 MB |
| Age rating | 4+ | 12+ |
| Developer | Thomas Warren | Daniel Kiss |
In-app purchases
iRis
No in-app purchases
Volt
- Volt Premium7 Days trial$6.991 Year









