AlterLock vs ResearchCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AlterLock
This app pairs with a theft prevention device to monitor your vehicle. It offers loud alarms, smartphone notifications, and GPS tracking to deter theft and provide location updates. Manage vehicle details, device settings, and track your assets with peace of mind.
- Movement-detection alarm
- Smartphone notifications
- Independent communication
- Advanced GPS tracking
- Vehicle registration
- Device settings adjustment
- Map-based location history
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The AlterLock app works in conjunction with the theft prevention device "AlterLock" to keep an eye on your beloved vehicle, including bicycles, motorcycles, and cars. The AlterLock device provides peace of mind through loud alarms, smartphone notifications, and GPS tracking capabilities. Key features include: 1. Alarm to Deter Thieves: A movement-detection alarm sounds directly from the device, deterring criminals and providing a strong deterrent against theft and vandalism. 2. Smartphone Notifications for Assurance: If the device detects movement, it will send a unique notification sound to your smartphone, allowing you to quickly notice and rush to your vehicle. 3. Independent Communication Function: The device can communicate on its own, sending notifications and location information even outside the Bluetooth range. 4. Advanced Tracking Ability: It attempts to pinpoint location information indoors and outdoors by receiving not only precise GPS signals but also Wi-Fi and cell tower signals. Additional App Functions: - Register photos, specs, and frame numbers of your vehicles. - Toggle the device's lock mode. - Adjust various device settings (detection sensitivity, alarm patterns, on/off, duration of sound, regular communication, accident detection, etc.). - Display tracking location information and history on the map screen. - Manage up to three vehicles and devices. Please note: - User registration is required to use the service. - Purchase of the AlterLock device and a service agreement is also required. - This service does not guarantee theft prevention. For more details on service contracts and usage fees, please visit: https://alterlock.net/en/service-description Terms and Conditions: https://alterlock.net/en/service-terms Privacy Policy: https://alterlock.net/en/privacy-policy
ResearchCalc
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ResearchCalc is a calculator for life-science researchers, built for the calculations that come up every day in the lab: dilutions, molar concentrations, statistics, and more. Save key results on the same screen and reuse them in your next prep with one tap. Work through media prep, dilution series, and statistics without flipping between notes and other apps. Works fully offline. [Built-in conversions (13 free)] · Dilution (C₁V₁ = C₂V₂) · Stock prep (M × V × MW) · Stock prep (mass conc., m = C × V) · %w/v solution prep · %v/v solution prep · X-fold stock dilution · Molar mass (g ↔ mol) · Specific gravity (g ↔ mL) · A260 → nucleic acid concentration · A280 → protein concentration · OD600 → cell density (microbes) · Antibody / stain dilution (1:N) · Serial dilution [Scientific keys + statistics] Tap fx (top right) to switch to scientific mode. Trig, log, exp, and exponents — plus quick statistics (mean / SD / SEM / CV%) computed in one tap from a list of numbers. [Memos — keep results on screen] Pin important results at the top of the calculator screen. For multi-step prep (e.g. stock → dilution → reaction mix), recall earlier values without changing screens. Tap the × button on a memo chip to remove it. [39 compound presets] Built-in molecular weights and densities for common reagents (NaCl, Tris, DMSO, glycine, glucose, and more). Pull them up from any conversion. [History] Every calculation is auto-saved. Search through history and pin anything worth keeping as a memo. [Privacy] App-generated data (history, memos, presets, settings) is stored on the device only and is not sent to external servers. No account required. The free tier uses Google AdMob, which may collect or process device data per Google's policies for ad delivery. Ads are removed entirely with the Pro upgrade. [Pro (one-time purchase, no subscription, for research and educational use)] · 7 additional conversions: reagent batch prep, cell seeding, cell density (hemocytometer), concentrated acid/base dilution (purity + density), % additive (stock-volume basis and final-volume basis), and animal-research unit conversion (mg/kg + concentration → preparation volume, non-clinical research only) · Add and edit compound presets · Keep history with no time limit (up to 200 entries) + CSV export · Up to 15 memos (free tier: 3) · Customize keypad layout · No ads [Who it's for] · Life-science researchers (biology, biochemistry, pharmacology, biomedical research, including industry R&D) · Undergraduates, graduate students, and postdocs [Disclaimer] ResearchCalc is a calculation aid for research and educational use only. It is not intended for determining patient dosing, clinical diagnosis, treatment decisions, or use as a medical device. Always verify calculation results before use. The developer assumes no responsibility for any damages arising from the use of this app.
Screenshots
Verdict
The clearest difference is ads: AlterLock at none against ResearchCalc's shown. ResearchCalc's advantage is update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support 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. AlterLock sells 2 in-app purchases, starting at $3.99 per month and ResearchCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
AlterLock ships an update every 2 months, ResearchCalc every 3 weeks. The most recent releases landed on October 19, 2026 and October 8, 2026 respectively.
| Parameter | AlterLock | ResearchCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 87 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | NEXTSCAPE INC. | Akira Sugiyama |
In-app purchases
AlterLock
- Monthly Plan7 Days trial$3.991 Month
- Annual Plan1 Month trial$39.951 Year
ResearchCalc
- Pro Unlock$3.99









