JavaSnipt vs DataLeft
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JavaSnipt
This utility blocks JavaScript on websites to prevent ads, popups, and unnecessary scripts. Users can selectively block sites or apply blocking to all websites, with iCloud syncing across devices. It aims to improve privacy, battery life, and data usage.
- Blocks JavaScript on websites
- Removes ads and popups
- Reduces third-party script usage
- Selective site blocking
- Global site blocking option
- iCloud sync across devices
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A NoScript equivalent for Safari! This app blocks JavaScript on any website. It blocks most: • Ads • Newsletter popups • Cookie requests • Wasted megabytes of third-party JavaScript libraries When you encounter a website with too much JavaScript, just tap share → JavaSnipt → refresh, and voilà! No more interactivity. Alternatively, you can use JavaSnipt to block JavaScript on *all* websites and allow only sites you trust. It's up to you! Some sites, like YouTube, will not work with JavaScript blocked. That's why JavaSnipt targets only sites you select. By purchasing JavaSnipt for iOS, you will also unlock JavaSnipt for macOS. Your blocked sites sync between all your devices via iCloud. The web has too many popups and third-party scripts. It wasn't designed to respect your privacy, battery life, data cap or phone-sized screen. Take back control with JavaSnipt. (The crab is Snippy, our mascot. Think of this app as him snipping away the extra JavaScript!)
DataLeft
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How much data is left? DataLeft answers on your Lock Screen — before you ever open the app. A calm gauge shows what's left of your plan and how many days it needs to last. If you're burning through data faster than the days, you'll see it in one glance — and get a heads-up before it's a problem. AT A GLANCE • Remaining data as a dual-ring gauge: data left vs days left • Widgets for Home Screen, Lock Screen, and StandBy • Alerts at 50 / 80 / 95% — helpful, never alarming BUILT FOR TRAVEL • Add your travel eSIM before you fly • Get a reminder to switch on arrival, and another before it expires • Fixed-period plans with D-day countdown PRIVATE BY DESIGN • No subscription. No server. No VPN. • Nothing leaves your device — there is nothing to collect • Works entirely offline DATALEFT PRO (one-time purchase) • Multiple plans — home plan and travel eSIMs side by side • Deep insights: 30-day trends, weekly rhythm, cellular vs WiFi • Daily budget alerts • Premium widgets Note: iOS provides device-wide network counters to apps. DataLeft shows accurate totals for your device; per-app breakdowns are not possible for any third-party app.
Screenshots
Verdict
The clearest difference is price: DataLeft at Free against JavaSnipt's $2.99. DataLeft also leads on update cadence (every 2 weeks vs every 5 months) and iOS requirement (18.0 vs 26.0). JavaSnipt's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads 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
DataLeft is free to download; JavaSnipt costs $2.99 up front. DataLeft sells 1 one-off in-app purchase. JavaSnipt asks for nothing beyond the download.
JavaSnipt ships an update every 5 months, DataLeft every 2 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.
| Parameter | JavaSnipt | DataLeft |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.1 (7 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 5 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 26.0 | 18.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Kyle Nazario | Oh Hyeon Kwon |
In-app purchases
JavaSnipt
No in-app purchases
DataLeft
- DataLeft Pro$2.99









