Uhm... Maybe Jaxx changed. Or behaves weird sometimes.

There are two aspects here: the one about showing unconfirmed transactions and the one about pending transactions.

So, about showing unconfirmed transactions, I confirm that it doesn't show them. Last week I was expecting to receive some BTC and I could see the transaction on Blockchain (with 0 confirmations), but not in Jaxx. I saw it after it received a confirmation. And this happened with 2 transactions. There is no "pending" transaction shown when you expect to receive funds inside the wallet.

The "pending" transactions are those which you send from Jaxx, but they don't have confirmations or have few confirmations. For this kind of transactions there is indeed a "pending" status, which lasts until the transaction receives 1-3 confirmations. This is also the weird part: so I saw a transaction which switched from "pending" to "completed" while having just 1 confirmation, but I also saw transactions which still appeared in "pending" after 2 or 3 confirmations. Even more weird is the fact that a transaction with 3 confirmation, which appeared as "pending", switched to "completed" without receiving another confirmation.

Also about the sent transactions which appear as "pending" starting with 0 confirmations: they are shown in Jaxx at several seconds (maybe even 30-60 seconds) after being shown on Blockchain. It seems the wallet acts with some lag.

All of the above occur on Jaxx on both BTC and ETH.

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Excepting all these, I also noticed that the number of confirmations appears slower on Jaxx after the transaction receives confirmations and these are shown on Blockchain. The delay here is up to 2-3 minutes. Jaxx shows also the number of confirmations of a transaction. And I was checking (many times) the transactions on Blockchain and I could see that one (let's say) had 2 confirmations. Jaxx was showing it has only 1. When the transaction received a third confirmation on Blockchain, Jaxx was showing it has 2 etc.

Last, but not least, another weird thing about Jaxx is that it doesn't allow you to send another transaction until it sees a previous one completed. This lattest part is also weird, as sometimes it considers a transaction as being completed after 1 confirmation, sometimes after two, sometimes after three... So excepting the fact that it doesn't have a fixed number determining when a transaction is completed, it also doesn't allow you to send another transaction before the completion of the previous one (and it's only up to Jaxx's "mood" when a transaction switched from pending to completed).

In comparison, Bitcoin Wallet for Android allows you to send another transaction, although the previous one is not confirmed yet (it allows you although the previous one has 0 confirmations).

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Back on topic, I confirm again that Jaxx doesn't show incoming transactions with "pending status". It only shows outgoing ones with this status, but not immediately after they are broadcast. They (outgoing transactions with 0 confirmations) are shown as pending after several seconds.

And Bitcoin Wallet for Android behaves the same: it doesn't show an incoming transaction with 0 confirmations. (I still can't see in my wallet that transaction I previously mentioned, which was sent to me on January 30th - https://blockchair.com/bitcoin/transaction/abb0a820a43e92ff9e3a1f9e6967f2c59e76b5cd1909d44c06af813e75251913 - and which still has 0 confirmations (I hope miners will process it though prior BTC soars to $1M )).