SyncML LITE 4 vs Arca by Privacy Everywhere
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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 Since then, it has been largely superseded by other technologies, most notably CalDAV and CardDAV, which iOS supports out of the box without any extra app.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.
Arca by Privacy Everywhere
This email client offers robust PGP encryption for secure communication. Your private keys are generated and stored locally on your device, ensuring they never leave. It seamlessly integrates with other PGP-compatible applications.
- PGP encryption
- Local key generation
- Private key security
- Public key server storage
- Compatibility with PGP Standard apps
- Supports PGP/mime and old format
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Standard email client with PGP encryption option. Keys are generated locally, and private key never leaves users device. Public key is sent to the server. The app is compatible with all PGP Standard apps. Supports both the PGP/mime and the old format with encrypted cyphertext in the body of the message.
Screenshots
Verdict
The clearest difference is update cadence: Arca by Privacy Everywhere at weekly against SyncML LITE 4's every 26 months. SyncML LITE 4's advantage is iOS requirement (10.0 vs 15.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SyncML LITE 4 ships an update every 26 months, Arca by Privacy Everywhere weekly. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.
| Parameter | SyncML LITE 4 | Arca by Privacy Everywhere |
|---|---|---|
| Price | Free | Free |
| Rating | 1.7 (3 ratings) — better | — |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 3 — better | — |
| Update frequency | Every 26 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 6 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Lukas Zeller | Privacy Everywhere ApS |
Customer experience
SyncML LITE 4
Arca by Privacy Everywhere
In-app purchases
SyncML LITE 4
No in-app purchases
Arca by Privacy Everywhere
No in-app purchases
Questions
Is SyncML LITE 4 free?
Is Arca by Privacy Everywhere free?
Do SyncML LITE 4 or Arca by Privacy Everywhere have ads?
Which is updated more often, SyncML LITE 4 or Arca by Privacy Everywhere?
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