DataFastView vs Say In Bulbs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DataFastView
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Your iPhone is measuring itself all day. DataFastView is where you get to see it. Live Wi-Fi quality, battery, CPU, memory, storage and the weather — in the Dynamic Island, on the Home Screen, in Control Center, and on one screen inside the app. Everything is measured on the device. There is no account, no tracking, and nothing to sign up for. WI-FI QUALITY, NOT SIGNAL BARS A full-bar connection with 300 ms of jitter is a bad connection, and the bars will never tell you. DataFastView scores your link from 0 to 100 using four things it measures directly: • Round-trip time to your own router • Round-trip time to the internet • Jitter — how much that time varies • Packet loss Live upload and download rates sit next to the score, and a download-speed test runs only when you tap the button. Tap "How this score is measured" to see exactly how the four are weighted. Nothing is hidden behind a marketing number. ENERGY AND SYSTEM Battery level and charging state, Low Power Mode, and thermal state — Normal, Elevated, High or Critical. CPU on a fixed 0-100% scale, so a phone idling at 3% does not draw the same mountain as one at 100%. Memory split into active, wired, compressed and free. Free storage and time since the last restart. There is no battery temperature, health or cycle count, because iOS publishes no public API for any of them. Any app showing you those is estimating. This one tells you what it actually knows. THE DYNAMIC ISLAND Choose one metric for the left side and one for the right, from CPU, memory in MB or percent, storage in GB or percent, uptime, battery, thermal state, network rates, Wi-Fi quality, or a clock that keeps ticking on its own. Every option shows its live value while you pick, so you are choosing from real numbers rather than names. WIDGETS Actions (medium) — up to ten launch buttons of your own, in two rows of five, each with a symbol or a real app icon and a colour you choose. Load a screenshot of your wallpaper and the widget reads as transparent. Storage and network (small) — a ring of used space, free and used in GB, and the last Wi-Fi reading. Weather (large) — current conditions, temperature, feels-like and the next five days, in the app's own palette. Weather data provided by Apple Weather. There are Control Center controls too, and rotating phrases on the Lock Screen. WEATHER Current conditions, the next hours and the next days, with a two-day temperature trend on the Now tab that marks every peak and trough. Location is used only to ask for the forecast where you are, and only while you are using the app. TOOLS A password generator that runs entirely on the device, using the system's cryptographic random source. Set the length and character classes, exclude look-alike characters (O 0 I l 1) and keyboard runs (abc, 123, qwe), and read the real strength in bits of entropy. Nothing is stored, nothing is sent, and the clipboard copy expires. PRIVACY No account. No analytics. No advertising. No third-party SDKs. The app has no server, so there is nowhere for your data to go. Everything you configure lives on your iPhone and disappears when you delete the app. ONE PAYMENT Buy it once. No subscription, no trial that turns into a bill, no in-app purchases. English and Spanish. iPhone only, iOS 17.6 or later. Weather data provided by Apple Weather. https://developer.apple.com/weatherkit/data-source-attribution/
Say In Bulbs
Transform your phone into a bright, scrolling LED message sign. Type or draw custom messages and symbols for easy visibility in crowded places. Works offline and offers advanced customization with a one-time purchase.
- Scrolling dot-matrix LED sign
- Custom drawing tool
- Ready-made drawings library
- Full-screen display
- Offline functionality
- Apple Watch app integration
- Customizable LED colors and backgrounds (Pro)
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Hold up your phone and be seen. Type a few words and the screen becomes a scrolling dot-matrix LED sign, bright enough to read across an arrivals hall, a dance floor or a warehouse aisle. No sign-up, no account, no menus to learn. Open it, type, hold it up. Or draw the sign yourself. Paint the panel bulb by bulb with a finger and hold up an arrow, a heart, a symbol or a shape no font has. Drawing is free. READY-MADE DRAWINGS Need a sign right now? Pick a ready-made drawing and it is on the panel in one tap - a jack-o'-lantern pumpkin and a skull for Halloween to start. Change a few bulbs to make it yours. Free. A REAL LED PANEL A fixed grid of round bulbs, lit ones glowing, unlit ones still faintly there, so it reads as a physical sign rather than as text on a screen. - Full-screen sign with nothing in the way, in either orientation - Turns smoothly with the phone, even when rotation lock is on - Screen brightness turned up and held there, then handed back when you leave - Stays awake for as long as you hold it up - Works offline, in a building with no signal MADE FOR - Airport and station pickups, when a name has to be spotted from a distance - Concerts and festivals, when shouting will not carry - Race finish lines, to find your runner and be found - Weddings, birthdays and Halloween parties - Warehouses, shop counters and car parks, where there is no sign and you need one ON YOUR WRIST The Apple Watch app comes with it and works with or without your iPhone nearby. Pick a quick pick, a recent message or a saved sign, or dictate, scribble or type a new one, and it fills the watch face. Turn the Digital Crown to change the speed. The watch keeps its own signs. FREE, AND UNLIMITED The sign is free and it stays free. Unlimited signs, each running as long as you like, never interrupted, never nagged, never cut off. Amber on black, dot matrix, scrolling at whatever speed you choose. Drawing and the ready-made drawings are free, and so is saving one sign to come back to. SIB PRO One purchase, once. Not a subscription. Pro is control over how the sign looks: - Six LED colours instead of one - Four sign backgrounds: black, navy, maroon and white - Solid glow, as an alternative to the dot-matrix panel - Adjustable text size, from a whole-screen shout to a longer message - Static and bouncing signs, alongside scrolling - Flash, pulse and colour-cycle effects - Unlimited saved signs, drawn or typed Buy it once and it is yours, restorable on a new phone or after a reinstall. The same purchase unlocks Pro on your iPad, Mac, Apple TV and Apple Watch, on the same Apple Account. EASY TO READ, SAFE TO LOOK AT Larger text sizes and VoiceOver are supported throughout. Nothing in the app flashes faster than 3 Hz, in either tier. Reduce Motion is honoured, and there is a separate Reduce Flashing control if you would rather not change a system setting. Flash safety is never something you have to pay for. NOTHING LEAVES YOUR PHONE No account. No server. No analytics. What you type and what you draw stay on the device: never uploaded, never logged, never sent anywhere. The only network the app ever touches is the App Store, for your Pro purchase and restore. A sign can be a name, a phone number, a medical note or a slogan, and none of that is anyone else's business.
Screenshots
Verdict
The clearest difference is in-app purchases: DataFastView at none against Say In Bulbs's 1. Say In Bulbs's advantage is update cadence (every 3 days vs every 3 weeks) and device support (5 vs 1). On price, ads and iOS requirement 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. Say In Bulbs sells 1 one-off in-app purchase. DataFastView asks for nothing beyond the download.
DataFastView ships an update every 3 weeks, Say In Bulbs every 3 days. The most recent releases landed on October 21, 2026 and October 22, 2026 respectively.
| Parameter | DataFastView | Say In Bulbs |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, Mac, Apple TV, Apple Watch — better |
| Requires iOS | 18.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Moscoso Pacheco, Gonzalo Juvenal | Kamil Popczyk |
In-app purchases
DataFastView
No in-app purchases
Say In Bulbs
- Say It Big Pro$3.99







