TTLock vs SafeDays
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TTLock
Control smart locks using your phone via Bluetooth. This app requires compatible hardware to function. Contact support within the app for assistance.
- Open doors via Bluetooth
- Requires compatible hardware
- In-app support contact
- Secure access
- Integrates with Alexa
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TTLock is used to open the door via bluetooth with your phone. To do this, APP should cowork with specific hardware. You can contact with us in the APP, if there is any question.
SafeDays
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"Safe Days," is a revolutionary application designed to help women track their menstrual cycles and fertility patterns. Safe Days provides a user-friendly calendar-style interface that accurately predicts ovulation days, fertile days, infertile days, and even the chances of conceiving a baby boy or girl. The application's main goal is to empower women with knowledge about their reproductive health, allowing them to make informed decisions regarding family planning. By simply inputting the start and end dates of their menstrual cycles, users can access a comprehensive overview of their fertility status for each day. Safe Days employs advanced algorithms and data analysis techniques to calculate the fertile window, which includes the days leading up to and including ovulation. This information is particularly valuable for couples who are trying to conceive or for individuals who want to avoid pregnancy. Moreover, Safe Days goes beyond just identifying fertile days; it also provides insights into the chances of conceiving a boy or a girl. By considering factors such as the timing of intercourse and the pH levels in the reproductive tract, the application estimates the probability of conceiving a baby of a specific gender. While it's important to note that this is not a guarantee, it can serve as a useful tool for those with a preference or who are simply curious. Safe Days stands out for its intuitive design, ensuring that users can navigate the app effortlessly and access the information they need at any given time. The calendar interface allows for easy tracking and planning, empowering women to take control of their reproductive journey. With Safe Days, women can gain a better understanding of their menstrual cycles, fertility patterns, and the optimal timing for conception. Whether it's planning a pregnancy, avoiding one, or simply gaining insights into fertility, Safe Days is a valuable companion that promotes informed decision-making and supports women's reproductive health
Screenshots
Verdict
The clearest difference is price: TTLock at Free against SafeDays's $9.99. TTLock also leads on in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 14 months). SafeDays's advantage is ads (none vs shown).
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
TTLock is free to download; SafeDays costs $9.99 up front. SafeDays sells 1 one-off in-app purchase. TTLock asks for nothing beyond the download.
TTLock ships an update every 3 weeks, SafeDays every 14 months. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.
| Parameter | TTLock | SafeDays |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 2.9 (551 ratings) — better | — |
| Positive reviews | 25.4% of reviews | — |
| Number of ratings | 551 — better | — |
| Update frequency | Every 3 weeks — better | Every 14 months |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone |
| Requires iOS | 15.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 371 MB | 9 MB |
| Age rating | 4+ | 17+ |
| Developer | Hangzhou Sciener Smart Technology | Bodnar Marin |
Bugs and requests
TTLock
Reported bugs
5 issues- App crashes after updates
- Can't delete old locks from app
- Fingerprint scanner not working
- Remote unlock not functioning
- Passcode changes not syncing
Requested features
5 requests- Show lock/unlock status in app
- Add proximity unlock feature
- Improve Alexa integration
- Allow minute-level passcode scheduling
- Provide better customer support
SafeDays
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TTLock
No in-app purchases
SafeDays
- SafeDays$0.99








