StopTheScript vs Local Calendar Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StopTheScript
This Safari extension for iOS, iPadOS, and macOS blocks all JavaScript on selected websites. It effectively stops both inline and externally loaded JavaScript, offering more comprehensive control than standard content blockers.
- Blocks all JavaScript
- Stops inline JavaScript
- Stops external JavaScript
- Safari extension
- Supports iOS, iPadOS, macOS
Read full descriptionHide full description
StopTheScript is a Safari extension for iOS, iPadOS, and macOS that stops all JavaScript on your selected websites. StopTheScript is the only Safari extension that stops inline JavaScript on the web page as well as externally loaded JavaScript. This is in contrast to Safari content blockers, which can only block external JavaScript, not inline JavaScript. StopTheScript is made by indie developer Jeff Johnson. If you need support, please email me at stopthescript@underpassapp.com or read the support site at https://underpassapp.com/StopTheScript/support.html
Local Calendar Sync
Automatically sync events between your calendars without sharing confidential data. This app creates blockers or copies of appointments in other calendars to ensure accurate availability display. It operates entirely offline, protecting your privacy.
- Automatic event synchronization
- Creates event blockers or copies
- Ensures accurate availability display
- Works fully offline
- Does not collect user data
- Uses native calendar access
Read full descriptionHide full description
Dealing with multiple calendars in your life? Keep them in sync without exposing confidential information and get rid of cross-calendar conflicts! Whenever you have an appointment in one calendar, this app creates a Blocker or a full copy of that event in your other calendars automatically in the background. What problem does this solve? By keeping your calendars in sync, you ensure that your colleagues or family members can see your correct availability. Your availability status only gets shown based on the events that you have in a single calendar. So your colleagues at work might see you as “free”, even though you have an appointment on another calendar at that time. Why not use an online service? There are several online services that offer to sync your calendars for you. They all require you to provide them with access to your calendar so that they can manage your calendars, which most security departments won’t allow. This app though works fully offline on your computer, uses native tools to access your calendar and does not collect any data. Please note, that this app can only synchronize calendars, that have been added to your device's Internet Accounts in the System Settings.
Screenshots
Verdict
The clearest difference is review sentiment: Local Calendar Sync at 100% against StopTheScript's 70%. Local Calendar Sync also leads on chart position (#194 vs unranked). StopTheScript's advantage is price ($5.99 vs $6.99) and iOS requirement (15.0 vs 17.0). On update cadence, ads, in-app purchases and monetization model 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
StopTheScript costs $5.99 and Local Calendar Sync $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
StopTheScript ships an update every 4 months, Local Calendar Sync every 5 months. The most recent releases landed on October 17, 2026 and October 4, 2026 respectively.
| Parameter | StopTheScript | Local Calendar Sync |
|---|---|---|
| Price | $5.99 — better | $6.99 |
| Rating | 4.5 (31 ratings) — better | — |
| Positive reviews | 70.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 31 — better | — |
| Update frequency | Every 4 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #194 — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Jeff Johnson | Robin-Manuel Thiel |
Customer experience
StopTheScript
Local Calendar Sync
In-app purchases
StopTheScript
No in-app purchases
Local Calendar Sync
No in-app purchases
