If you're a Gmail user, then I recommend Inbox by Gmail. However, if you use a different email service -- or you use several -- then I suggest you take a look at Microsoft Outlook, which is one of the best (if not the best) mail apps for iOS out there
If you want an app that can encrypt your email, then take a look at iPGMail. This is an app that implements the OpenPGP standard (RFC 4880, RFC 6637) and allows the user to create and manage both public and private (RSA, DSA, ECDSA) PGP keys and send and receive PGP encrypted messages.
Caption by: Adrian Kingsley-Hughes
Browsing
For me, my browser of choice is Google Chrome. But others might prefer Opera Coast, or Firefox, or something completely different such as Dolphin. At the end of the day, they are all web browsers, and which you prefer is largely down to personal preference.
Caption by: Adrian Kingsley-Hughes
Secure browsing
If you're looking for a browser that offers more security features and functions such as parental controls, the F-Secure's SAFE is a good choice. It's particularly good if you carry out banking via the browser on your iPhone because it verifies the safety of the site you are visiting.
Caption by: Adrian Kingsley-Hughes
Messages
There are a lot of alternatives that spring to mind (such as WhatsApp, Facebook Messenger, etc.), and which you choose really depends on what you family, friends, and work colleagues' use. But if I'm going to replace Messages with anything, I'd go for Signal, because if it's good enough for Edward Snowden, it's good enough for me.
Caption by: Adrian Kingsley-Hughes
If super-secure messaging isn't your thing
If super-secure messaging isn't your thing, then a very popular and highly-regarded messaging app is GroupMe, which, as the name suggests, is good for group messaging.
Caption by: Adrian Kingsley-Hughes
Camera
I've tried dozens of camera apps for iOS and tend to switch between Camera+ (which offers tons of control and has an awesome slow shutter feature) and Manual, which is the closest to having a DSLR with me when I only got my iPhone, and both are great, easy-to-use replacements for the built-in app.
Caption by: Adrian Kingsley-Hughes
Pro photography app
If you want a pro camera app with built-in features such as noise reduction and super low-light performance, then ProCamera is well worth taking a look at. At $4.99, it's one of the more expensive apps, but for photography under demanding conditions, it really excels.
Caption by: Adrian Kingsley-Hughes
Calculator
Lots of calculator apps to choose from, but my favorite is PCalc Lite, which even comes with an awesome Apple Watch app.
Caption by: Adrian Kingsley-Hughes
Graphing calculator
If it's a graphing calculator you're after, then look no further than Quick Graph. Not only is this app free (there's an in-app purchase to unlock advanced features), but it's very powerful and versatile.
Caption by: Adrian Kingsley-Hughes
Reminders
Who doesn't need reminding about tasks? While I think that which reminders app people get along with best is a matter of personal preference, I suggest those looking to replace the built-in Reminders app take a look at Todoist (which is great for people who like to collaborate) or Wunderlist (which offers a number of professional features as part of the Pro subscription).
Caption by: Adrian Kingsley-Hughes
Reminders with desktop synchromization
If you want a Reminders replacement that features desktop synchronization, then Any.do is a great alternative. This means your reminders follow you no matter what platform you are using!
Caption by: Adrian Kingsley-Hughes
Calendar
Let me tell you that there are a lot of calendar apps in the Apple App Store, and finding the right one can be tricky and time-consuming.
Three that I've found to be particularly good are, in no particular order, Fantastical 2 (which comes with a great Apple Watch app), Tiny Calendar (which has some of the best layouts I've seen), and miCal (which has some really nice features such as built-in weather and a birthday manager).
Caption by: Adrian Kingsley-Hughes
If you're more of a 'Getting Things Done' person
If you're more of a 'Getting Things Done' person than an straight-out calendar person, then Things might be a better choice for you.
Caption by: Adrian Kingsley-Hughes
Clock
I like the Start app, not only because it's an easy-to-use alarm, timer, and stopwatch app, but also because it can be used to trigger certain apps (which include Facebook, Fantastical, Instagram, Music, Pandora, Path, Reeder, Rdio, Safari, Sparrow, Spotify, and Tweetbot) when the timer reaches zero.
Caption by: Adrian Kingsley-Hughes
Alarm clock
If you want to turn your iPhone into a full-on alarm clock with built-in weather forecast and cool graphics, then you need Alarm Clock Pro. Here you'll find no end of features to make sure you wake up in the morning.
Caption by: Adrian Kingsley-Hughes
Notes
Without a doubt the winner here is Evernote, because it integrates with your workflow so well no matter what platform you are on. However, hardcore Microsoft Office users might want to give OneNote a go.
Caption by: Adrian Kingsley-Hughes
Notes with collaboration
If you want a simple replacement for Notes, but want to have the ability to collaborate and store data outside of iCloud, then SimpleNotes is well worth a try.
Caption by: Adrian Kingsley-Hughes
Weather
Three good replacements for the Weather app spring to mind. The best is undoubtedly Dark Sky, but that's going to cost you. For those who'd rather have a free app, The Weather Channel app or Weather Underground are also excellent.
Caption by: Adrian Kingsley-Hughes
Weather, without needing a meteorology degree
If you just want something that offers a little more than the stock Weather app, and you like pretty photographs, then Yahoo Weather is the app for you. This is one of the most beautifully designed apps out there, and it even comes with an Apple Watch app.
Caption by: Adrian Kingsley-Hughes
Maps
While there are a number of good in-car navigation apps out there, when it comes to general mapping, the best alternative for the stock iOS Maps app is Google Maps.
Caption by: Adrian Kingsley-Hughes
Topographic maps
If roadmaps aren't your thing and you want to go off-road, then take a look at Topo Maps+, which gives you access to USGS maps.
Caption by: Adrian Kingsley-Hughes
Stocks
If the Stocks app isn't doing it for you, then an app like Stock TickerPicker might give you access to the information you need.
Caption by: Adrian Kingsley-Hughes
Hardcore stocks app
If you're looking for streaming live quotes, pre-market/after-hour quotes, portfolio monitoring, advanced full-screen chart, push notification-based alerts, economic news, event/earnings calendar, and market signal scans, then Stock Tracker is the app you need.
iOS 10 gives iPhone and iPad users the ability to delete built-in apps such as Mail, FaceTime, and Music and replace them with third-party apps. But which apps should you choose?
Deleting a built-in app is the same as deleting any other app, just press and hold on the icon on the Home screen until they jiggle, and then tap the X. Press the Home button when you're done.
(Updated Dec 1, 2016)
Read MoreRead Less
Topographic maps
If roadmaps aren't your thing and you want to go off-road, then take a look at Topo Maps+, which gives you access to USGS maps.
Are
you
finding
that
your
iPhone's
battery
life
is
bad
since
installing
iOS
12.1.4?
I'm
coming
across
numerous
reports
that
on
social
media
from
users
who
claim
that
Apple's
latest
...
I'm
sure
I'm
not
alone
when
I
say
that
I
too
many
apps
on
my
iPhone.
But
while
many
are
ones
that
I
turn
to
occasionally,
and
other
were
flash-in-the-pan
apps
that
I
used
for
a
bit
and
then
...
iOS
doesn't
give
a
direct
way
to
passcode
access
to
apps,
but
by
using
the
Screen
Time
feature
we
can
pull
off
something
that
is
workable.
Bear
in
mind
that
this
trick
does
have
limitations,
...
Are
you
finding
that
your
iPhone's
battery
life
is
bad
and
just
doesn't
make
it
through
the
day?
Or
has
the
problem
started
recently,
maybe
after
installing
iOS
12.1?
Here's
how
to
use
...
The
bottom
line
is
that
the
longer
you've
been
using
an
iPhone,
and
the
more
you've
made
use
of
Apple's
features
and
services,
the
harder
it's
going
to
be.
(Updated
December
2018)
...
Your
iPhone
and
iPad
is
likely
packed
with
important,
valuable,
and
even
sensitive
information
that
you
might
not
want
others
to
be
able
to
access.
Here
are
the
steps
you
should
take
...
iOS
12
is
packed
with
loads
of
useful
features.
The
only
problem
is
that
if
you
don't
know
about
them
you
might
never
know
they
are
there!
Here's
a
compilation
of
my
favorite
features.
...
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