Comparison

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.

Head to head
About

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.

Highlights
  • Contacts-only synchronization
  • SyncML engine
  • Syncs selected iOS contact stores
  • Acts as local SyncML server
  • Assign/remove contact group membership
Features
Read full description

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 Since then, it has been largely superseded by other technologies, most notably CalDAV and CardDAV, which iOS supports out of the box without any extra app.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.

About

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.

Highlights
  • PGP encryption
  • Local key generation
  • Private key security
  • Public key server storage
  • Compatibility with PGP Standard apps
  • Supports PGP/mime and old format
Read full description

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

SyncML LITE 43 screens
Arca by Privacy Everywhere3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
SyncML LITE 4 versus Arca by Privacy Everywhere: the parameters behind the verdict, then further details
ParameterSyncML LITE 4Arca by Privacy Everywhere
PriceFreeFree
Rating1.7 (3 ratings) — better—
Positive reviews—0.0% of reviews
Number of ratings3 — better—
Update frequencyEvery 26 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS10.0 — better15.0
Further details — not scored
Size6 MB38 MB
Age rating4+4+
DeveloperLukas ZellerPrivacy Everywhere ApS

Customer experience

SyncML LITE 4

All ratings3 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Arca by Privacy Everywhere

Written reviews2 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

SyncML LITE 4

No in-app purchases

None

Arca by Privacy Everywhere

No in-app purchases

Questions

Is SyncML LITE 4 free?
SyncML LITE 4 is free to download, with no in-app purchases.
Is Arca by Privacy Everywhere free?
Arca by Privacy Everywhere is free to download, with no in-app purchases.
Do SyncML LITE 4 or Arca by Privacy Everywhere have ads?
Neither SyncML LITE 4 nor Arca by Privacy Everywhere shows ads.
Which is updated more often, SyncML LITE 4 or Arca by Privacy Everywhere?
SyncML LITE 4 ships an update every 26 months, and Arca by Privacy Everywhere weekly. Most recently, SyncML LITE 4 was updated on October 16, 2026 and Arca by Privacy Everywhere on October 5, 2026.

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