Cornerstone Bids vs Vowlock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cornerstone Bids
Streamline concrete and masonry estimating with phase-based takeoff calculators and automated pricing. Generate professional proposals quickly from your mobile device or web browser, empowering subcontractors to bid with confidence.
- Phase-based takeoff calculators
- Centralized pricing
- Quantity tracking
- Professional proposal generation
- Cross-device access
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DESCRIPTION Cornerstone Bids is built for concrete and masonry subcontractors who are tired of estimating with spreadsheets and being tied to a computer. Create accurate takeoffs by phase—including footings, slabs, walls, columns, and more—with calculators designed around the work you perform in the field. Set your material, labor, and equipment pricing once in Project Settings, and automatically apply it throughout your estimate. When your estimate is complete, turn it into a clean, professional proposal in seconds. Cornerstone Bids gives working subcontractors the practical tools they need to estimate faster, stay organized, and bid with confidence. FEATURES • Phase-based takeoff calculators • Centralized material, labor, and equipment pricing • Concrete, rebar, block, and wire mesh quantity tracking • Professional proposal generation • Access estimates from your phone, tablet, or web browser
Vowlock
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Vowlock is a strict app blocker for people who are done negotiating with themselves. Block apps behind Apple's Screen Time shields, seal the block with a vow, and make breaking it cost something real. Less brain rot, more evenings that are actually yours. Most app blockers are a toggle you flip off the moment an urge hits. No iOS blocker is unbreakable, so Vowlock is built on a harder truth: breaking one should cost something. With Vowlock you do not just block distracting apps. You seal a vow. SEAL A VOW, BLOCK APPS FOR AS LONG AS IT RUNS Choose the apps that eat your evenings: the feeds, the games, the one you open without deciding to, and any website you would rather not open. Choose how long the vow runs, from fifteen minutes to a full day. Then seal it with a short ritual: one line that is true for you, one spoken plea recorded on camera, and a heartbeat pulsing through the phone as you commit. From that second, your chosen apps go dark behind Apple's Screen Time shields. Think of it as a focus mode you cannot swipe away. AN APP LIMIT THAT ACTUALLY HOLDS Vowlock is an app limiter without a daily allowance to renegotiate. The app time limit holds for the whole window you chose, not until you tap Ignore. That is the difference between a screen time app that asks you to stop scrolling and a screen time blocker that keeps its word. BREAKING COSTS SOMETHING An app blocker you can switch off in two taps is only a suggestion. Want out early? Vowlock will not shame you, but it will not make it easy. You sit through the break ritual, feel that same heartbeat again, and watch the recording of yourself asking you not to. Most urges do not survive that mirror. Willpower is easier to find when the version of you who made the promise is looking back. STOP DOOM SCROLLING, STAY FOCUSED Use Vowlock as a distraction blocker to stop doomscrolling at night, to stay focused through a work block, or as a social media blocker for the whole weekend. Doom scrolling ends when the feed is simply not there. Need a reels blocker? Vowlock takes Instagram, TikTok or YouTube off the table whole, the app itself rather than one tab inside it, so the reels and shorts go with it. Self control is a muscle. Every kept vow is one more rep, and every rep teaches your thumb that the feed can wait. THE PROMISE WALL Every vow becomes a glass pane on your wall. Kept vows shine. A broken pane does not shame you; it reforges after seven kept days. Over weeks, the wall becomes a quiet record of who you are becoming: discipline you can look at, rather than a streak you dread losing. DOPAMINE DETOX ON YOUR OWN TERMS Run a phone detox for one evening, a dopamine detox for a weekend, or a longer digital detox to reduce screen time for good. Vowlock is a digital detox app for phone addiction that does not pretend the cure is a chart of your usage. Addiction to the feed loosens its grip when the feed is sealed behind a promise. Recurring schedules seal the same vow on the days and hours you choose, a home screen widget keeps your progress in sight, a Lock Screen countdown keeps the running vow in view, and weekly patterns show when your urges cluster so the next vow covers that hour. NOTHING LEAVES YOUR IPHONE Vowlock is a self control app, not a surveillance app. Your pleas and your app list stay on this device. No account. No upload. Apple's Screen Time technology means Vowlock cannot even see the names of the apps you block. Vowlock is the app blocker for people who are done negotiating with themselves. Seal the vow. Keep it. Watch the wall fill. Requires iOS 17 or later and Screen Time permission. Free to download; some features are available through an optional subscription, with details shown in the app before any purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://vowlock-app.web.app/privacy Support: https://vowlock-app.web.app
Screenshots
Verdict
The clearest difference is in-app purchases: Cornerstone Bids at none against Vowlock's 3. Cornerstone Bids also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.0). On price, update cadence 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. Vowlock sells 3 in-app purchases, starting at $9.99 per month. Cornerstone Bids asks for nothing beyond the download.
Cornerstone Bids ships an update every 3 days, Vowlock every 4 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Cornerstone Bids | Vowlock |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 days — better | Every 4 days |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 0 MB | 16 MB |
| Age rating | 17+ | 4+ |
| Developer | Cornerstonebids LLC | Eren Demirkesen |
In-app purchases
Cornerstone Bids
No in-app purchases
Vowlock
- Plus Monthly$9.991 Month
- Plus Annual7 Days trial$49.991 Year
- Plus Lifetime$74.99









