Renumber vs SyncML LITE 4
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Renumber
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Never forget an important number again. From passport numbers and renewal dates to daily habit streaks and upcoming birthdays, Renumber is your secure, all-in-one workspace for every number that matters in your life. ORGANIZED CATEGORIES Stop hunting through notes or photos. Renumber organizes your life into smart categories: • Statics: Store sensitive ID numbers, passport details, and codes securely. • Dates: Beautiful count-ups and count-downs for birthdays, anniversaries, and renewals. • Counters: Effortlessly track daily tallies, habits, or inventory with a simple swipe. SECURITY & PRIVACY FIRST Your data belongs to you. Renumber stores all information locally on your device—never on a server. • PIN Protection: Lock your entire workspace with a secure passcode. • Grace Period: Instant locking when you leave the app, with a 5-second grace period for quick multitasking. EXPRESS YOURSELF Make Renumber yours with deep personalization options: • Custom Themes: Choose from a curated palette of primary and secondary colors. • Alternate Icons: Match your home screen aesthetic with various app icon styles. • Live Cover View: A beautiful, cycling display of your favorite items right on the main screen. SMART SHARING Show off your milestones! Generate high-quality, perfectly sized images for Facebook, TikTok, Instagram Stories, Messages, and more. Share your latest habit streak or a countdown to a big event in style. STAY INFORMED Set custom notifications so you never miss a renewal deadline or a loved one's special day again. TERMS OF USE: This app uses Apple’s standard End User License Agreement (EULA), available here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SyncML LITE 4
This app synchronizes iOS contacts with servers using the legacy SyncML standard. It's designed for users who specifically need this older technology, often recommended by IT departments. It can also act as a local SyncML server for older devices.
- Contacts-only synchronization
- SyncML engine
- Syncs selected iOS contact stores
- Acts as local SyncML server
- Assign/remove contact group membership
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SyncML LITE 4 is a niche app which synchronizes iOS contacts with a server or service which uses a standard called SyncML. The app does not support any other synchronisation technology! So please install this app only if you know SyncML-based synchronisation is what you need! This may be the case when the IT people of your organisation say so, and maybe even explicitly recommend using SyncML LITE to synchronize contacts. In any case, please realize that for using this app, you need to know the URL of your syncml server, the login user to use, and the so called server path for contacts. Only the provider of the SyncML service knows these details and can support you in establishing sync with his SyncML server. We as makers of the SyncML client app cannot! By now, SyncML is a legacy standard. It was invented in 2000, and many of that time's feature phones did support it. Since then, it has been largely superseded by other technologies, most notably CalDAV and CardDAV, which iOS supports out of the box without any extra app. But SyncML still exists, and for some older systems, it may be the only way to synchronize. For those cases, SyncML LITE 4 exists. SyncML LITE 4 is a rework of the former SyncML LITE app, to allow using SyncML on iOS 10 (the original SyncML LITE app only works up to iOS 9). If you also want to synchronize calendar please consider SyncML PRO 4 or Tasks+Cal+Sync 4. The summary for SyncML LITE 4: • Free app for contacts-only synchronisation - please consider SyncML PRO 4 or Tasks+Cal+Sync 4 if you also want to synchronize calendar data. • based on a mature and extensively interoperability tested SyncML engine, which powers many SyncML client and server products for different platforms (libsynthesis). • synchronizes selected iOS contact stores (address books) to a SyncML compliant server or service in the internet or in the local network. • can act as SyncML server in the local WiFi network (e.g. to keep really old mobiles in sync with an iOS device) • has a contacts list for the iOS contacts, and allows quickly assigning/removing contact group membership (that's a new feature in SyncML LITE 4) Please visit the plan44.ch web page (see support link below) for support and FAQ, as well as documentation for download.
Screenshots
Verdict
The clearest difference is in-app purchases: SyncML LITE 4 at none against Renumber's 3. SyncML LITE 4 also leads on ads (none vs shown) and iOS requirement (10.0 vs 16.6). Renumber's advantage is update cadence (every 2 months vs every 26 months). On price 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. Renumber sells 3 in-app purchases, starting at $0.99 per month. SyncML LITE 4 asks for nothing beyond the download.
Renumber ships an update every 2 months, SyncML LITE 4 every 26 months. The most recent releases landed on October 15, 2026 and October 26, 2026 respectively.
| Parameter | Renumber | SyncML LITE 4 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.7 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 2 months — better | Every 26 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 10.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Miciniti Technologies | Lukas Zeller |
In-app purchases
Renumber
- Monthly$0.991 Month
- Yearly$9.991 Year
- Renumber Lifetime$29.99
SyncML LITE 4
No in-app purchases









